October 15, 2026

How to Fix Candle Tunneling (and Stop It From Happening Again)

Silver Gloss ALEC with its lid open over a lit three-wick jar candle

Candle tunneling is when the wick burns straight down the middle of the jar and leaves a thick ring of unused wax around the sides. It wastes wax, weakens the scent and can eventually drown the wick. Most tunneling can be fixed at home.

Why candles tunnel

The first burn was too short. If the wax never melted to the edges, later burns tend to follow the same small circle.
Burns are too short in general. Quick 30-minute burns rarely let the melt pool spread.
The wick is too small for the jar, which is a design issue with some candles.

Three ways to fix a tunneled candle

1. The foil method

Wrap a strip of aluminum foil around the top of the jar so it overhangs the wax, leaving an opening in the middle for the flame. Light the candle and let it burn. The foil reflects heat back onto the outer wax so it melts and levels out. Stay with the candle the whole time and remove the foil carefully once the jar has cooled.

2. Melt the top layer evenly

With the candle unlit, use a hair dryer on a low setting to soften the top layer of wax until it is level. Let it set, then relight it and allow a long, full burn.

3. Do a full reset burn

If the tunnel is shallow, simply let the candle burn until the melt pool reaches the edges. It can take a few hours, so plan for it.

How to prevent tunneling

On the first burn, let the wax melt all the way to the edges. A common rule of thumb is about one hour per inch of jar diameter.
After that, burn long enough for a full melt pool, but follow the label and stop at about four hours.
Trim the wick to about 1/4 inch before each burn.
Keep the candle away from drafts.

The other half of the problem: putting it out

Burning long enough to avoid tunneling is easy to forget, and so is putting the candle out on time. ALEC lets you set the burn time up front. When the countdown reaches 0:00, the lid closes over the jar and the flame goes out without blowing wax around. Check our fit guide to see which jar candles fit.

Safety

Never leave a burning candle unattended, especially when using the foil method. Keep candles away from anything flammable and out of reach of children and pets. More in our candle safety guide.