Wick behaviour

Candlewick is a loose weave that allows molten wax to flow through it and if the wick becomes clogged with dust or other particles then the flow of wax is likely to be impeded and the flame will burn poorly.

When a candle is first lit, the flame initially draws on the wax immediately below itself and it is quite normal for some smoke to be produced.

Smaller wicks consume themselves as the candle burns down; it does this by curling into the edge of the flame - which is hotter. Thicker wicks will burn with a smoky flame if the wick becomes too long and will need trimming with scissors.

As the heat of the flame melts more wax around itself, a wick pool is established. The diameter of the pool is determined by the size of the wick and the hardness of the wax. If water is to get into the wick pool, the flame is likely to spit and splutter and will go out.

Smoky wicks need trimming as they cause soot on walls and ceilings, as well as smelling foul!

If a candle is burning in a draught or close to other heat sources, it is likely to drip or overflow. If this happens it leaves the wick too long and in need of trimming.