How to Fix Candle Tunnelling

How to Fix Candle Tunnelling

 

Eco Candle Wicks from ₹59 / 10 · Thin C1 and Thick C2 Soy wax from ₹260 / 500g Made & stocked in India · ships nationwide
CSI troubleshooting guides
Foil will rescue a shallow tunnel. Only a bigger wick stops the next hundred candles from doing it again.
★★★★☆
"Quality of the wick is good for jar candles, team can work on the pricing and delivery timelines."
Monika DeepVerified buyer · Oct 2025
Eco Candle Wicks
★★★★☆
"Good quality .... if possible delivery date would be try little bit quick please"
Subhankar RoyVerified buyer · Sep 2024
Eco Candle Wicks
★★★★★
"Quality wick, works very well"
AshwiniSep 2025
Eco Candle Wicks
★★★★★
"Good one"
Sneha TamangVerified buyer · Apr 2025
Premium Candle Wicking Needle
★★★★★
"This needle is very helpful as it doesn't damage the mould and there is no leakage of wax while pouring.. I would definitely recommend this .."
LJAug 2024
Premium Candle Wicking Needle
★★★★★
"This bamboo wick holder doesn't exert any pressure on the wicks… and it is a very useful product 👌🏻👌🏻.."
Lalitha JaganAug 2024
Bamboo Wick Holder
★★★★☆
"Quality of the wick is good for jar candles, team can work on the pricing and delivery timelines."
Monika DeepVerified buyer · Oct 2025
Eco Candle Wicks
★★★★☆
"Good quality .... if possible delivery date would be try little bit quick please"
Subhankar RoyVerified buyer · Sep 2024
Eco Candle Wicks
★★★★★
"Quality wick, works very well"
AshwiniSep 2025
Eco Candle Wicks
★★★★★
"Good one"
Sneha TamangVerified buyer · Apr 2025
Premium Candle Wicking Needle
★★★★★
"This needle is very helpful as it doesn't damage the mould and there is no leakage of wax while pouring.. I would definitely recommend this .."
LJAug 2024
Premium Candle Wicking Needle
★★★★★
"This bamboo wick holder doesn't exert any pressure on the wicks… and it is a very useful product 👌🏻👌🏻.."
Lalitha JaganAug 2024
Bamboo Wick Holder
Reviews collected and published through Judge.me on candlemakingsuppliesindia.store. These are general reviews of the wicks and wick tools named beside them, not reviews of this guide or of any tunnelling fix. Wording is unedited except where an ellipsis marks a trim.
✓ Eco Candle Wicks in Thin (C1) and Thick (C2) ✓ 7 products in the Candle Wicks collection ✓ GST invoicing · MSDS on request
Candle Troubleshooting · Burn Faults
Two different jobs, and most makers only do the first one. Rescue the candle that is already tunnelling with foil or heat, then rebuild the recipe with a three-jar wick test so the fault stops shipping. The causes are diagnosed on the sibling post; this page is the repair.
₹961.33
what a full three-jar wick re-test costs in wicks, wax, fragrance and jars · CSI live pricing, September 2026 · the linked product page is always authoritative
Quick answers — read this first
Can I save a candle that has already tunnelled? Sometimes. Foil-wrap works when the wax wall left standing is roughly 10 mm or less. Wrap the top of the jar in aluminium foil with a hole over the flame, burn two to three hours, let it set. Deeper than that and the candle is a write-off — say so and move on.

What actually stops it recurring? One wick size up, then three identical test jars burned side by side. The pass mark is a melt pool that reaches the glass wall in two to three hours with no soot and no mushrooming.

What does the fix cost? ₹247.80 for a Thin C1 and Thick C2 test spread, plus roughly ₹571.94 of wax and fragrance across three 200g test jars. Under a thousand rupees to stop a fault that generates refund messages for months.

Why is my candle tunnelling in the first place? That is a separate question with a list of answers — the diagnosis is on why is my candle tunnelling. Read that first if you have not identified the cause.
The short answer
Fix the candle in your hand: foil-wrap for a shallow tunnel, a Hot Air Gun at ₹531 for a stubborn one, and an honest write-off for anything deeply tunnelled.
Fix the recipe: re-wick one size up — Eco Candle Wicks Thin (C1) to Thick (C2) — and burn-test three jars. Change one variable at a time.
Fix the customer's burn: first-burn to the wall, trim to 5 mm, no draughts. Printed on a Candle Care Sticker at ₹0.83 a unit.
Shop: Candle Wicks · Candle Wax · Containers · bulk on WhatsApp.
The tunnelling fix — decide the candle first, then fix the recipe CANDLE IN HANDWax wall left standing? ≤10 mm >10 mm FOIL WRAP · 2–3 hrs WRITE IT OFF EITHER WAY → THE RECIPE IS STILL WRONG RECIPE PATH · ONE VARIABLE AT A TIME 1 · WICK UPC1 → C2 2 · THREE-JAR TESTidentical jars, side by side 3 · POOL TO THE WALLin 2–3 hrs, no soot 4 · FAIL? NEXT VARIABLEwax grade · load · dye · draughts loop back and change exactly one thing
Two decisions, not one. The top row disposes of the candle you are holding — foil if the standing wax wall is about 10 mm or less, write-off if it is deeper. The bottom row is the only thing that changes the next batch: wick up one size, burn three identical jars, judge against a pool that reaches the wall in two to three hours, and if it fails, loop back having changed exactly one variable.
Straight answer
How do you fix a candle that is tunnelling?
There are two fixes and they are not the same job. To rescue the candle in front of you: wrap aluminium foil around the top of the jar leaving a hole above the flame, burn for two to three hours until the standing wax wall melts back level, then remove the foil and let it set flat. That works when the wall is roughly 10 mm or less. A Hot Air Gun at ₹531 does the same thing faster and carries a real risk of overheating the glass. A deeply tunnelled candle is a write-off — refund it, remake it, and stop spending an hour on a ₹200 jar. To stop it happening again: the wick is undersized for the vessel until proven otherwise, so go one size up — Eco Candle Wicks ship in Thin (C1) at ₹5.90 each and Thick (C2) at ₹9.44 each — and burn-test three identical jars side by side. The pass mark is a melt pool that reaches the glass in two to three hours with no soot and no mushrooming. If that fails, change one variable at a time: wax grade against vessel diameter, fragrance load, dye quantity, then draughts. The causes are diagnosed separately in why is my candle tunnelling.
One line: foil rescues a shallow tunnel, nothing rescues a deep one, and only a bigger wick proved out over three test jars stops the next batch tunnelling.
The whole recipe fix runs on one product. Eco Candle Wicks: Thin (C1) from ₹59 per 10, Thick (C2) from ₹188.80 per 20 — ₹247.80 buys you both ends of the test spread with wicks to spare.
Shop Eco Candle Wicks

Part one — rescuing the candle in your hand

This half of the page fixes one candle. It fixes nothing about the next hundred, and it is important that you know which job you are doing.

A tunnelled candle has burned a narrow shaft down the middle and left a wall of unmelted wax standing against the glass. The flame now sits in a well, starved of air, throwing almost no fragrance, and the wall thickens with every burn because it never gets hot enough to melt. Left alone the candle drowns itself and the customer is holding a jar two-thirds full of wax they paid for and cannot use.

Whether it can be recovered comes down to one measurement you can take with a ruler in ten seconds. Measure the thickness of the wax wall left standing between the shaft and the glass. At roughly 10 mm or less the foil method will almost certainly recover it. Much beyond that and you are asking an oxygen-starved flame to melt a substantial mass of cold wax — that is where makers lose an hour and still end up with a ruined candle.

1
Trim the wick to 5 mm before you do anything elseA wick that has been burning in a well is usually long, curled and carbon-headed. Trim it back to 5 mm with a wick trimmer at ₹295, or the alternative listing at ₹177, and remove every fragment of burnt wick and carbon debris from the wax surface. Debris in the pool is the fastest way to turn a rescue into a soot problem.
2
Wrap the top of the jar in aluminium foilOrdinary kitchen foil. Fold a strip into a double thickness and wrap it around the rim so it covers the standing wax wall completely and sits about 20–25 mm above the glass, like a collar. Leave a clear opening of roughly 30–40 mm directly above the flame so the flame has air and hot gases can escape. The foil is doing one job: reflecting radiant heat back down onto the cold wax at the edges, which the flame alone cannot reach.
3
Light it and leave it two to three hours, watchedThe standing wall softens from the top down. Check it every twenty minutes or so. You are finished when the wax has melted level right across to the glass. This is the same two-to-three-hour window you will use as the pass mark for the burn test in part two, and that is not a coincidence — you are manually forcing the full melt pool the wick should have produced on its own.
4
Remove the foil, blow it out, let it set flat and undisturbedTake the foil off before extinguishing so you are not lifting hot foil over a liquid pool. Then leave the jar level and still for four to six hours. Moving a jar with a full liquid pool is how you get a set surface that slopes, and a sloped surface tunnels again on the next burn. Expect the finished top to look slightly rougher than a factory pour — a rescued candle rarely resets perfectly smooth.
What foil can and cannot recover. It can level a shallow tunnel, reclaim wax that was going to be thrown away, and restore something close to the intended melt-pool diameter and therefore the fragrance throw. It cannot undo a jar that has already cracked or crazed from localised heat, cannot rescue a wick that has burned down below the level of the surrounding wax, cannot restore a perfectly level factory surface, and cannot fix the underlying recipe. A rescued candle whose wick is still one size too small will tunnel again — perhaps not on the next burn, but by the third or fourth. If the wick is short, sunken or drowned in oil, stop. There is nothing there to recover.

The heat-gun method does the same thing from above. A Hot Air Gun at ₹531 will melt the standing wall in three to five minutes instead of three hours, which is why every production bench eventually buys one. Hold it well back — 15 to 20 cm — keep it moving in a slow circle, and target the wax wall rather than the centre. Stop the moment the surface goes level. You are not trying to boil the wax; you are trying to take the top two or three millimetres to liquid and let it flow.

The heat-gun risk, stated plainly
A heat gun puts out a far higher air temperature than a candle flame, and glass fails on thermal shock — a steep temperature difference across the vessel wall, not absolute heat. Hold it in one spot, or aim it straight down the glass, and you can crack or shatter a jar that had nothing wrong with it. Work on a heatproof surface, never over a customer's table. Never heat a jar that is chipped, crazed, or cold from storage. Never leave the gun running unattended.

Now the honest verdict, which most tunnelling articles will not give you. A deeply tunnelled candle is usually a write-off. If the wall is thick, the shaft has burned past halfway, the wick is drowned or the glass shows heat marks, the arithmetic has already turned against you: an hour of attention and a heat gun's worth of risk, spent on a jar whose materials cost a few hundred rupees. Remake it or refund it. What you must not do is send a rescued candle out as new — it will underperform, and the customer remembers the second failure more clearly than the first.

Foil buys back one candle. A bigger wick buys back the batch. Only one of those is worth your afternoon.
— CandleMakingSuppliesIndia

Part two — rebuilding the recipe so it stops happening

If your candles tunnel, the recipe is wrong. Rescuing individual jars is customer service; this is the actual repair.

Work through the following in order, and change exactly one variable between test batches. That sounds obvious and almost nobody does it. A maker who changes wick and wax together, gets a clean burn and cannot say which change did it has learned nothing. Everything below assumes a 200g container candle in a jar of roughly 70 mm internal diameter; scale to your own vessel.

1
Go one wick size up — and only oneEco Candle Wicks come in Thin (C1) at ₹5.90 a wick and Thick (C2) at ₹9.44 a wick at every pack size. If you are tunnelling on C1, your next test is C2. Do not jump to a wooden wick at ₹59 a piece, and do not double-wick the jar, because both of those change the vessel's whole thermal behaviour and you will not know what you learned. One step. Wick size against jar diameter is set out in the wick guide by diameter.
2
Pour three identical test jarsThree, not one. One jar tells you what one jar did; three tells you whether the result repeats. Same wax, same batch, same fragrance, same load, same pour temperature, same jar, same ambient conditions, same day. Use a wick centering device at ₹118 for a pack of 5, or a bamboo wick holder at ₹118 for a set of 5, so the wick is genuinely central in all three. An off-centre wick produces a lopsided pool that reads exactly like a wick-size failure and is not one.
3
Cure, then burn all three side by side and time the poolGive them the same cure period you give production stock, then light all three together in a closed room and start a timer. The pass mark is a melt pool that reaches the glass wall in two to three hours. Faster than two hours and the wick is probably oversized — expect soot, mushrooming and an overheated jar. Slower than three, or never reaching the wall at all, and it is still undersized. In a 70 mm jar the full pool is about 38.5 cm²; a pool that only opens to 40 mm across is about 12.6 cm², roughly a third of the surface and roughly a third of the fragrance release.
4
If it still fails, check the wax grade against the vesselThis is the check makers skip. Soy Pillar Wax at ₹600 per kg is formulated to hold its shape out of a mould, and it is the wrong wax for a container — a harder, higher-melting wax in a jar resists opening out to the wall no matter how you wick it. Container work belongs in Luxury Soy Wax CSI 464 at ₹507.40 per kg, Luxury Soy Wax Chunks at ₹599 per kg, or Premium Coconut Soy CSI 468 at ₹650 per kg. If you are on the wrong grade, that is your one variable for the next batch — and re-test the wick afterwards, because a different wax is a different pool.
5
Check the fragrance load is inside the stated rangeFragrance oil is fuel the wick has to lift and burn alongside wax, and past a point it interferes rather than helps. The manufacturers' stated formulation limits are up to 13% for Luxury Soy Wax Chunks and up to 10% for Luxury Soy Wax CSI 464. Those are wax formulation limits, not regulatory limits, and they are not interchangeable between waxes. Weigh the oil on a weighing scale at ₹354 rather than measuring by volume — load is a weight percentage and oils differ in density. If you are over the ceiling, bring it inside and re-test before you touch the wick again.
6
Check the dye quantityLiquid dye is concentrated and heavy pigment loading clogs the wick's capillary path, which chokes the flame and narrows the pool. CSI liquid candle dyes start at ₹236 for 15 ml and one CSI customer describes the purple as concentrated enough that "a little amount gives the candle good pastel shade". Take that literally. If you are pouring a deep, saturated colour and tunnelling, pour one uncoloured test jar alongside the coloured ones. If the uncoloured jar opens to the wall and the coloured ones do not, you have your answer without changing anything else.
7
Check for draughts before you blame the recipeA draught pulls the flame sideways. A flame leaning to one side melts one edge and leaves the opposite edge standing, and the result looks like tunnelling but is asymmetric — one thick wall, one thin one. Fans, air conditioning, an open window, a doorway, a passage between two rooms. Burn your test jars in a closed room with no air movement, and if the same candle burns clean there and tunnels on the customer's windowsill, the recipe was never the problem. That belongs on the care card, and part three of this page deals with it.
Argue against us for a moment
Do not buy anything until you have run the three-jar test with the wicks you already have. A great many "my candles tunnel" messages resolve to an off-centre wick, a draught, or a first burn cut short at forty minutes — none of which a purchase fixes. Pour three jars with current stock, burn them in a still room and time the pool. If it reaches the wall in two to three hours, you have a customer-education problem, not a materials problem. Buy the C2 wicks after that test, not before it.

The burn-test record sheet

Fill this in at the bench, during the burn, not from memory afterwards. Three rows per test — one per jar — and a new sheet every time you change a variable. The value is not in any single sheet; it is in being able to lay six of them side by side in three months and see exactly which change fixed the fault and which one you imagined.

Burn-test record · one row per jar
Seven fields. Record them as you observe them, not as a verdict at the end
Field What to record What good looks like
Wick size Type and size, e.g. Eco Thin (C1) or Eco Thick (C2) One step from the last test, never two
Time to full pool Minutes from lighting until wax reaches the glass all the way round 120–180 minutes. Under 120 is oversized; over 180 is undersized
Pool depth Depth of liquid wax at the centre, in millimetres, at the three-hour mark Roughly 10–13 mm. Deeper than about 15 mm means the wick is running hot
Flame height Height of the flame in millimetres, measured settled, not at lighting Steady 25–35 mm. Anything taller, or flickering and dancing, is too much wick
Soot Black deposit on the inside of the glass — none, faint ring, or heavy None. A faint ring after three hours is borderline; heavy soot fails the test
Mushrooming Carbon ball forming on the wick tip — none, small, or large None to small. A large mushroom means the wick is lifting more fuel than it can burn
Verdict Pass, undersized, or oversized — one word, decided against the rows above Pass on all three jars, or it is not a pass
Priced above: Eco Candle Wicks Thin (C1) ₹59 per 10 and ₹590 per 100 (₹5.90 each), Thick (C2) ₹188.80 per 20 and ₹944 per 100 (₹9.44 each) · Candle Making Weighing Scale ₹354 · Pen Thermometer ₹354 · Wick Centering Device ₹118 per pack of 5 · Candle Wick Stickers ₹100 per sheet of 40 (₹2.50 each) · Hot Air Gun ₹531. CSI live pricing, September 2026.
The CSI principle
One variable per test, three jars per variable, and the pool timed rather than eyeballed.
Every shortcut around that rule produces a candle that works once and cannot be reproduced. Reproducibility is the entire difference between a maker with a good week and a maker with a product.

What the fix actually costs

Makers put this test off because it feels expensive. It is not, and the arithmetic is short enough to do here. The figures below are CSI live pricing, September 2026, for a three-jar test on 200g candles at an 8% fragrance load — 184g of wax and 16g of oil per jar.

Cost of one complete three-jar wick re-test
Every rupee the test consumes, at CSI live pricing
Line What you buy Cost
Wick test spread Eco Candle Wicks Thin (C1), 10 wicks — ₹59.00 ₹59.00
Wick test spread Eco Candle Wicks Thick (C2), 20 wicks — ₹188.80 ₹188.80
Wax 552g of Luxury Soy Wax Chunks at ₹599/kg (3 × 184g) ₹330.65
Fragrance 48g of Sandalwood Fragrance Oil at 1kg pricing, ₹5,026.80/kg (3 × 16g) ₹241.29
Jars 3 × Amber Shiny Glass Jar with Black Lid at ₹236 per pack of 5 (₹47.20 each) ₹141.60
Total materials Everything the test consumes, jars included ₹961.33
Total without jars If you are testing in jars you already hold ₹819.73
Bench hours Roughly 1 hour to pour and wick three jars, 3 hours of watched burn, 1 hour to record and read the sheet ≈ 5 hours

That is the whole cost. Under a thousand rupees and about five hours of attention, and the wicks left over from the spread — you buy 10 C1 and 20 C2 and use three — carry into the next two tests at no extra cost. Set that against the alternative: a production run that tunnels, refunds, replacement postage, the hours spent answering messages, and a customer who does not reorder. On a 100-unit run at even a ₹200 unit cost you are risking ₹20,000 of materials plus every rupee of the advertising that acquired those buyers, to avoid spending ₹961.33. That is the point of this section. The fix is small, and the thing it prevents is not.

Scaling it once you have passed. Only after the three-jar test passes does bulk buying make sense. At that point Eco Candle Wicks at ₹590 per 100 for C1 or ₹944 per 100 for C2 hold the same per-wick price as the small packs, so there is no rush and no discount you are missing by testing first. Wax is where scale pays: Luxury Soy Wax Chunks are ₹599/kg at 1kg and ₹5,999 for 10kg, while CSI 464 runs ₹507.40/kg at 1kg and ₹5,074 for 10kg. Buy the 10kg only for the wax and wick combination that has already passed a burn test — a 10kg bag of the wrong wax is a far more expensive mistake than a ₹961 test.

Prevention on the customer's side

A correctly wicked candle can still tunnel if the first burn is cut short. That is not your recipe failing; it is an instruction you did not print.

Once the recipe passes, the remaining tunnelling comes from how the candle is burned. Three rules cover almost all of it, and the buyer has been told none of them, because most Indian candle brands ship without care instructions at all.

The first-burn rule. Wax has a memory. The first burn sets the diameter the melt pool will return to for the life of the candle, so the first burn must run until the pool reaches the glass all the way round — the same two to three hours you tested against. A candle blown out after forty minutes on its first burn has been taught to tunnel, and no subsequent burn fully corrects it. This single instruction prevents more tunnelling complaints than every recipe change on this page.

Trim to 5 mm before every burn. An untrimmed wick grows a carbon mushroom, burns tall and unsteady, soots the glass and produces an unevenly shaped pool. Five millimetres is the number. A wick trimmer at ₹295 or the ₹177 alternative listing is also a reasonable upsell to bundle with a premium candle, and it makes the instruction feel like a feature rather than a chore.

No draughts. Away from fans, air conditioning vents, open windows and doorways. A leaning flame melts asymmetrically, and asymmetric melting is tunnelling with a different cause. Add the standard safety line while you are at it: never burn longer than four hours at a stretch, never leave a burning candle unattended, keep away from children and pets.

Print all three on the jar. Candle Care Stickers Roll: ₹413 for 500 one-inch stickers — ₹0.83 each, or ₹699 for 1,000 at 1.5 inch (₹0.70 each). Under a rupee per candle to remove the most common cause of a complaint you cannot otherwise control.
Shop candle care stickers

Work out what that rupee is buying. If ₹0.83 stickers stop three tunnelling complaints in a hundred candles, you have spent ₹83 on the run to avoid three replacement candles, three courier charges and three conversations. It also changes the tone of the ones you do have: with the instruction printed on the jar, "did you let the first burn reach the edge?" is a question rather than an accusation. Most of the candle accessories range is optional; this one is close to compulsory if you sell to people who have never owned a soy candle.

One last argument against our own interest, because it is the most common way makers waste money here. Do not change your wax and your wick in the same test. It is tempting: you are annoyed, and changing both feels thorough. It is the opposite. If the batch burns clean you will not know which change did it, so you cannot reproduce it or explain it to whoever pours for you next year — and if it fails you have two suspects and no way to eliminate either. Change the wick. Test three jars. Read the sheet. Then change the wax. It is slower by two weeks and it is the only version that ends with a recipe you own. For a second opinion before you spend anything, message us on WhatsApp with your jar's internal diameter, the wax and the load.

Why trust this guide

CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished candles. The commercially convenient version of this page would tell you to buy thicker wicks, a heat gun and a new wax today. Instead the guide's first instruction is to run a three-jar test with the wicks you already own, because a large share of tunnelling turns out to be an off-centre wick, a draught or a truncated first burn — and a maker who buys the wrong fix twice stops trusting the supplier who sold it.

Every price on this page is taken from live CSI stock in September 2026 and links to the product page, where current pricing and specification always take precedence. The 13% and 10% fragrance figures are the loads stated by the manufacturers for Luxury Soy Wax Chunks and Luxury Soy Wax CSI 464 respectively; they are wax formulation limits, not regulatory limits, and they are not interchangeable between waxes. The two-to-three-hour full-pool target and the 5 mm trim length are standard container-candle practice, not CSI-specific claims.

For bulk pricing, GST invoicing, MSDS and IFRA documentation, or help matching a wick to a specific jar diameter, message us on WhatsApp at +91 7397976926.

Frequently asked questions

Does the foil trick really fix a tunnelled candle?
For a shallow tunnel, yes. Wrap a double thickness of aluminium foil around the rim so it covers the standing wax wall and stands 20–25 mm proud of the glass, leaving an opening of about 30–40 mm above the flame. Burn two to three hours until the wax melts level to the glass, remove the foil, extinguish and let it set flat for four to six hours. It works when the standing wall is roughly 10 mm or less. It will not rescue a drowned wick, a cracked jar or a deep tunnel, and it does not change the recipe that caused the fault.
Can I use a hair dryer or a heat gun instead?
A Hot Air Gun at ₹531 melts the standing wall in three to five minutes rather than three hours. The risk is thermal shock: glass cracks from a steep temperature difference across the vessel wall, not from heat alone. Keep the gun 15–20 cm back, keep it moving in a slow circle, aim at the wax rather than the glass, stop as soon as the surface is level, and never do it to a jar that is chipped, crazed or cold from storage. Work on a heatproof surface, and never leave it running unattended.
When should I just throw a tunnelled candle away?
When the standing wax wall is thick, when the shaft has burned more than halfway down, when the wick is drowned or sunk below the surrounding wax, or when the glass shows heat marks or crazing. At that point the rescue costs an hour of attention and carries a real chance of failing anyway, on a jar whose materials cost a few hundred rupees. Remake it or refund it. Never send a rescued candle out as new — it will underperform, and the second failure damages more than the first.
How do I know if my wick is one size too small?
Time the melt pool. Light the candle and record how long it takes for liquid wax to reach the glass all the way round. Two to three hours is the target. Longer than three hours, or a pool that never reaches the wall, means the wick is undersized. Faster than two hours, with soot on the glass, a tall dancing flame or a large carbon mushroom, means it is oversized. Go one step — Eco Candle Wicks Thin (C1) to Thick (C2) — and re-test three jars.
Why do I need three test jars instead of one?
Because one jar tells you what one jar did. An off-centre wick, a slightly cool pour or a stray draught can make a good recipe look bad or a bad one look acceptable, and with a single jar you cannot tell the difference. Three identical jars burned side by side in the same still room either agree or they do not, and disagreement is itself the finding — it usually points to inconsistent wick centring rather than wick size. A pass means all three passed.
Can too much fragrance oil or dye cause tunnelling?
Both can contribute. Fragrance is fuel the wick has to lift alongside the wax, and past the wax's stated ceiling the surplus interferes with the burn rather than helping it — up to 13% for Luxury Soy Wax Chunks and up to 10% for Luxury Soy Wax CSI 464, which are manufacturers' formulation limits, not regulatory ones. Heavy liquid dye loading, from ₹236 per 15 ml, can clog the wick's capillary path and choke the flame. Test each one separately, and pour an uncoloured control jar alongside the coloured ones.
Fix the candle, then fix the batch
₹247.80 of wicks and three test jars is the entire repair.
Eco Candle Wicks from ₹59 per 10 in Thin (C1) and Thick (C2), Luxury Soy Wax CSI 464 from ₹260/500g, Luxury Soy Wax Chunks from ₹299/500g, Premium Coconut Soy CSI 468 from ₹325/500g, Hot Air Gun ₹531 and Candle Care Stickers from ₹413 per 500. Message us with your jar diameter and wax for a wick recommendation, bulk pricing, GST invoicing and documentation.
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Editorial standards & sources
About this guide: Written by the CANDLEMAKINGSUPPLIESINDIA team. Product recommendations reflect the CSI range; the foil method, the three-jar test protocol, the burn-test record sheet and the melt-pool arithmetic apply to any supplier. Diagnosis of tunnelling causes is deliberately not repeated here — it lives on why is my candle tunnelling.

Customer reviews: The six reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on the product pages named beside them. They are general reviews of Eco Candle Wicks, the Premium Candle Wicking Needle and the Bamboo Wick Holder — not reviews of this guide, of the foil method or of any tunnelling fix. Names, star ratings, dates and products are as recorded by Judge.me; "Verified buyer" appears only where Judge.me recorded a verified purchase, which is the case for Monika Deep, Subhankar Roy and Sneha Tamang. Wording is unedited except where an ellipsis marks a trim.

Figures verified September 2026 (CSI live pricing): Eco Candle Wicks Thin (C1) ₹59.00 per 10 and ₹590.00 per 100 (₹5.90 each); Thick (C2) ₹188.80 per 20 and ₹944.00 per 100 (₹9.44 each). Performance Wooden Wicks ₹590.00 per 10 (₹59.00 each). Luxury Soy Wax Chunks ₹299.00/500g, ₹599.00/1kg, ₹5,999.00/10kg. Luxury Soy Wax CSI 464 ₹260.00/500g, ₹507.40/1kg, ₹5,074.00/10kg. Premium Coconut Soy CSI 468 ₹325.00/500g, ₹650.00/1kg. Soy Pillar Wax ₹600.00/1kg. Sandalwood Fragrance Oil ₹5,026.80/1kg (₹5.03/g). Amber Shiny Glass Jar with Black Lid ₹236.00 per pack of 5 (₹47.20 each). Hot Air Gun ₹531.00. Candle Wick Cutter/Trimmer ₹295.00, alternative listing ₹177.00. Candle Making Weighing Scale ₹354.00. Pen Thermometer ₹354.00. Wick Centering Device ₹118.00 per pack of 5. Bamboo Wick Holder ₹118.00 per set of 5. Candle Wick Stickers ₹100.00 per sheet of 40 (₹2.50 each). Candle Care Stickers Roll ₹413.00 per 500 at 1 inch (₹0.83 each) and ₹699.00 per 1,000 at 1.5 inch (₹0.70 each). Liquid candle dyes from ₹236.00 per 15 ml. Test-cost arithmetic assumes three 200g candles at an 8% fragrance load — 184g wax and 16g oil each: 552g wax at ₹0.599/g = ₹330.65, 48g oil at ₹5.0268/g = ₹241.29, three jars at ₹47.20 = ₹141.60, wick spread ₹59.00 + ₹188.80 = ₹247.80, total ₹961.33. Melt-pool areas are calculated from a nominal 70 mm internal jar diameter (38.5 cm² full pool) and a 40 mm pool (12.6 cm²). Fragrance load ceilings of up to 13% for Luxury Soy Wax Chunks and up to 10% for Luxury Soy Wax CSI 464 are wax manufacturers' stated formulation limits, not regulatory limits. Prices and availability change — the linked product pages are always authoritative.
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