If you want a crackling wick candle, then your candle must have a wooden wick! When any wood is heated, its molecules start to break down and release water vapour. This water vapour can become trapped in the pores of the wood, creating small pockets of air. As a wooden wick candle burns, the heat from the flame causes these pockets of air to expand. Eventually, the pressure inside the pockets becomes too great and they 'explode', releasing a burst of steam - this creates the desirable candle crackling sounds. Read on, Click here...