Best practice is to trim the candle wick to prevent soot buildup and prolong burn time.
It is recommended that you trim it to between ⅛ and ¼ of an inch and this should be done every 4 hours of burn time. After you blow out the flame, wait until the candle returns to room temperature before trimming the wick. You should then wait at least 2 hours before you light your candle again.
