Trim your wick to ¼ inch (6mm) before every single relight. That one habit determines the size of the flame, the amount of soot, how evenly the wax burns, and how long the candle lasts. It takes five seconds and most people skip it.
Why wicks need trimming at all
As a cotton wick burns, carbon builds up at the tip until it forms a small dark ball — what candle makers call a mushroom. Left in place, that carbon head does three things on the next light: it feeds a larger, hotter flame than the vessel was designed for; it flakes soot into the melt pool and the air; and it makes the flame unstable — the most common reason candles flicker even in still air.
A hotter flame also consumes wax measurably faster. An untrimmed wick can cost a 50-hour candle a third of its life — the math is in our guide to how long soy candles burn.
How to do it
When: before every relight, always on a fully cooled candle. Never trim a burning or still-warm candle — the trimmed tip falls into liquid wax and stays there.
How short: ¼ inch / 6mm. Shorter risks drowning the wick in the melt pool; longer feeds an oversized flame. If you're eyeballing it: about the width of a pencil.
With a wick trimmer: the angled head is designed to reach the bottom of a vessel and catch the clipping. Rest the base of the trimmer flat on the wax surface, close, lift the debris out.
Without a trimmer: nail clippers work well in deep vessels. Scissors work while the candle is still tall. On a cooled candle you can simply pinch off the charred tip with your fingers — it snaps off cleanly at the carbon line.
Non-negotiable: take the trimmings out. Debris left in the wax becomes a second wick when the flame reaches it — an actual fire risk, and the reason a candle sometimes burns with two flames.
If you trimmed too short
A wick cut below ¼ inch drowns: the melt pool rises over it and the flame dies. The fix is patient, not drastic — light it, let it burn a minute, blow out, and soak away a teaspoon of melt pool with a paper towel to lower the wax level around the wick. Repeat once or twice until the flame holds. Don't dig the wax out with a knife; that damages the surface and the wick base.
What a well-trimmed burn looks like
A steady, upright flame about an inch tall. No black smoke curling off the tip, no soot ring forming on the vessel, no wild dancing in still air. The melt pool spreads evenly to the edges — trimming and avoiding tunneling are two halves of the same habit. The full routine lives in our candle care guide.
Stāndle candles use a single lead-free cotton core wick, sized for the concrete vessel's diameter — trimmed to ¼ inch, they run a controlled, low-soot flame for around 50 hours per 300g candle. Lavendure 21 · Sandalure 18 · The Duo
FAQ
How short should I trim a candle wick? ¼ inch (6mm) — about the width of a pencil. Shorter risks drowning the flame in melted wax; longer produces an oversized, sooty flame.
Do I trim the wick before or after burning? Before every relight, once the candle is completely cool. Trimming a warm candle drops the charred tip into soft wax where it's hard to remove.
Can I trim a wick with scissors? Yes — scissors, nail clippers, or your fingers all work. A wick trimmer's only real advantages are reaching deep vessels and catching the clipping. The ¼ inch target matters; the tool doesn't.
Why does my wick mushroom? Carbon builds up when the wick draws wax faster than the flame can burn it — normal on any cotton wick after a long session, and made worse by burns over 4 hours. Trim the mushroom off before the next light; don't try to burn through it.
What happens if I never trim the wick? The flame grows with each burn: more soot on the vessel and in the air, wax consumed faster, flame increasingly unstable, and in deep vessels a real overheating risk. Most "bad candle" complaints are untrimmed-wick complaints.
