Wood wick vs cotton wick candles

The short answer

Cotton is the default for good reasons: it is predictable, it relights without thought, and it suits almost any jar. Wood trades that reliability for two things cotton cannot do — an audible crackle and a wider, shallower melt pool that releases scent across more surface at once. If the person receiving the candle wants the sound, wood is the only way to get it. If they just want a candle, cotton is the better gift and it is not a close call.

Neither wick says anything about the wax, and the wax is the variable that decides burn time, scent capacity and soot. A wood wick in cheap paraffin is still a cheap paraffin candle. Beeswax vs soy vs paraffin is the wax comparison, and this page is only about the wick.

What each wick actually is

Cotton wick

Braided cotton, usually with a paper or zinc core for rigidity, standing vertically in the wax. It burns with a tall, narrow flame, draws fuel up the braid by capillary action, and forms a carbon mushroom at the tip that needs trimming every few burns.

Wood wick

A thin flat strip of wood — commonly cherry or another hardwood — held upright in a metal clip. It burns along its top edge rather than at a point, which gives a short, wide flame perhaps a quarter the height of a cotton flame and perhaps three times the width.

The crackle

Real, and it is the wood itself: moisture and volatile compounds in the strip boil off as the edge burns, which is the same mechanism that makes a log pop in a fireplace. It is not an additive and it is not a speaker. It is also quieter than most people expect from the marketing — closer to a fire two rooms away than to a campfire.

The melt pool

The pool of liquid wax at the top. A wood wick makes a shallower, wider one; a cotton wick makes a deeper, narrower one. This is the real functional difference between them, and it is what drives everything in the table below.

The comparison, honestly

Why your wood wick candle keeps going out

This is the most common question about wood wicks and it nearly always has the same answer: the wick is too long. A wood wick that has burned for an hour has a charred top edge that no longer draws fuel efficiently, and the flame it produces is too small to keep the pool hot. Meanwhile the pool keeps deepening and eventually floods the wick. The fix is unglamorous — before every single burn, pinch the charred edge off between your fingers or snip it back to roughly an eighth of an inch above the wax, so you are lighting clean wood.

Two other causes are worth knowing. Too much wax in the pool, usually from burning for more than about four hours at a stretch, drowns the flame regardless of trimming; pour nothing out, just put it out and let it set. And a draught is far more damaging to a short wide flame than to a tall narrow one, so a wood wick on a windowsill or near an air vent will keep going out when the same candle on a table does not.

If the problem is a hole down the middle rather than a flame going out, that is a different failure and why candles tunnel is the page for it — the first burn is what decides it, and the rule is the same for both wick types.

Which to buy, by who is getting it

• A gift for someone whose taste you do not know. Cotton. A wood wick candle that needs a technique explained is a gift with homework attached, and the first time it goes out they will assume it is faulty.
• Someone who has mentioned the crackle. Wood, in the narrowest jar you can find, with the trimming instruction written in the card. That one line is the difference between a candle they love and a candle they give up on.
• A room with a fireplace nobody uses. Wood. This is the clearest case for it — the sound is doing something the room was built for.
• A bedroom or a desk. Cotton. A crackle that is pleasant in a living room is a distraction next to a keyboard or a pillow.
• Someone who wants the strongest scent in the room. Neither answer is the wick. Go to soy candles for fragrance capacity, or non-toxic candles if the question behind the question is what is in the wax.

What the makers state, and what they do not

Wick type is nearly always on the listing, because it is a selling point. Wick width, number of wicks and jar diameter usually are not, and those are the three numbers that predict whether a wood wick candle will behave. Where a listing states only wood wick and shows a wide jar in the photograph, treat it as the configuration in the skip call above.

Burn time is the other number that goes missing, from both wick types. How long handmade candles last has what the real listings on this site do and do not state, and the arithmetic for working out the rest. For the full wood wick selection rather than the comparison, wood wick candles is the roundup.