Trimming your candle wick to 1/4" - 1/2" after each burn keeps your candle clean and helps it continue to burn evenly from start to finish. This allows candles to continue to fill a space with fragrance longer. Simply lower the trimmer to extinguished candle wick (allow to cool completely beforehand), and trim the burned wick to 1/4"-1/2". Use the trimmer blades to catch the debris, and dispose if the trimmed wick.