A wick is a thin piece of material, often made of cotton or other fibers, that draws liquid fuel up into a flame. It is commonly found in candles, oil lamps, and some types of lanterns. The wick's ability to absorb and transport fuel is essential for maintaining a steady flame, allowing the light to burn consistently. When a wick is lit, the heat from the flame vaporizes the fuel, creating a steady source of light. The length and thickness of the wick can affect how quickly it burns and how much light it produces. Proper wick maintenance is important for optimal performance in devices like candles and oil lamps.