Candle Care is a priority. Candles are a wonderful way to set a mood, create an ambiance, and enjoy fragrance, but without proper maintenance they may cause more harm than good. Soot is a collection of black residue on a container. It can be prevented by keeping the candle wick trimmed to a proper 1/4 inch. Blowing the candle out too extinguish it also created black residue that can settle on walls and furniture. By using Clean-Cut® Products as part of the candle burning regiment you will enjoy your candles in a clean and worry free environment.