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How to recycle cigarette filters
Extinguish the cigarette by grinding out the flame.
For safety, extinguish cigarettes fully before attempting to recycle them. You can do this by throwing the cigarette on the ground, stepping on it, and twisting your foot.
You should no longer see any glowing or smoke coming from the cigarette butt. If you have an ashtray, push the cigarette's lit end into it until the heat and smoke stop.