Why are fibreglass wicks better then cotton wicks.Unlike replacement cotton wicks, our fibreglass wicks will last indefinitely with normal use, saving you money and time in the long run.Our patented-construction replacement wicks offer better fuel flow to the flame than a conventional braided cotton wick.Our fibreglass wicks "wick" Firefly fuels efficiently and economically for the best flame shape, colour and smoke-free operation of your oil lamp or tiki torch.Our replacement wicks require only about 0.6cm - 1.3cm exposure from the torch or lamp.For best results, the fibreglass wick should be exposed just enough to provide a smooth and steady flame shape.If your wick is overexposed, the flame will be unsteady, ragged, smoke excessively and waste fuel.It's best to start with a 0.6cm inch exposed wick, and work your way up from there until you achieve your desired flame.Fibreglass wicks are not consumed during use, however, they may need to be replaced if contaminated with water or poor-quality fuel.You will find wick replacement necessary when switching between paraffin oil, torch fuel or kerosene, and remember to let a new wick absorb the oil in the lamp before you light it.