Wick/wɪk/ Definition 1 of 5Pro Tip 1/3Trim Regularly For optimal candle use, regularly trim the wick for even burning and to prevent soot. Remember to trim the candle wick before lighting it again. Pro Tip 2/3Length Matters Wick length affects the size and stability of the flame, impacting how well the candle burns. A too-long wick can cause a large, smoky flame. Pro Tip 3/3Fuel Efficiency A wick's primary function is to deliver fuel to the flame, making it essential for light sources. A well-made wick ensures the lamp burns efficiently.