Modern Wick Trimmers
If you don't have one, that means you're probably not trimming your wick...
You should trim your wick before you light it every time. Trimming your wick increases your candles hot throw, reduces wick mushrooming and black smoking. So, take care of your candles and trim their wicks!
Back Label Reads: Before you light your candle each time, be sure to trim your wick and reposition it to the center. Pouredgoods.com