「Trimming Candle Wick Precision Scissors Better」の動画素材（ロイヤリティフリー）3749761587 | Shutterstock

You may have lit a "mushroomed" candle wick before and had the soot explode a little all through your beautiful soy wax, leaving dirty black dots all through it! So why trim your candle wick? Trimming the candle wick is super important to make your candle burn cleanly, safely, and it will last much longer! If you don't, the soot can build up and "mushroom" on the wick. It means far more soot is put into the air, and also is the reason why you see some jars get covered in black soot on the inside

RONXS 3 in 1 Candle Accessory Set, Candle Wick Trimmer Cutter, Candle Snuffer Extinguisher, Wick Dipper with Gift Package for Candle Lover (Black)