NEW! Diptyque Gold Wick Trimmer An expert accessory that lets you regularly trim the wick of your Diptyque candle, thereby ensuring that it burns optimally and smokelessly throughout its usage. Start by extinguishing the flame of your candle. Then use the wick trimmer to recenter the wick. Once the candle has cooled, trim the wick to a length of 3 to 5 mm.