Candle care
How to Fix a Tunneling Candle (and Stop It Happening Again)
June 10, 2026 · 4 min read · by Liza
In short
To fix a tunneling candle, you need to melt the sunken wax back to a flat, even surface. The easiest method is the foil trick: trim the wick, light the candle, then wrap a loose collar of aluminium foil around the rim with a small opening at the top. The trapped heat melts the high edges down over 30–60 minutes until the whole top is liquid. Let it set and your candle is reset. For mild tunneling, a hairdryer on low can gently melt and level the top instead. To stop tunneling forever, always allow a full first burn: keep the candle lit until the wax pools all the way to the edges, which usually takes two to three hours for a standard jar. Wax has a 'memory', so that very first burn sets the pattern for every burn after.
Tunnelling is the most common candle problem there is — and the good news is it's almost always fixable.
The foil trick, step by step
Trim the wick to 5 mm and light the candle. Wrap a strip of aluminium foil around the top like a collar, folding it slightly inward over the candle with a hole left in the centre. Leave it for 30–60 minutes until the entire surface has melted flat, then remove the foil and let it cool. Most candles bounce right back.
Why candles tunnel in the first place
Wax remembers its first burn. If you blow a candle out before the top has melted edge to edge, it creates a 'memory ring' — and every future burn follows that same narrow tunnel, wasting 20–30% of the wax down the sides.
How to prevent it for good
Give every new candle a full first burn of two to three hours, until the melt pool reaches the edges. Keep the wick trimmed, burn on a level surface away from drafts, and don't burn for more than about four hours at a time.
Frequently asked questions
Can you save a badly tunneled candle?
Usually yes. The foil trick melts the high edges back down; for deep tunnels, a hairdryer or carefully removing excess hard wax first will help.
How long should the first burn be?
Long enough for the wax to melt all the way to the edges — about two to three hours for a standard jar candle. This sets the pattern for every future burn.
Does tunneling mean the candle is bad quality?
Not necessarily. Even great candles tunnel if the first burn is cut short. Wick size matters too, but burning habits are usually the cause.
by Liza
Liza is the maker behind Pretty Petal. She pours every candle by hand at home, and shares what she learns along the way right here.
