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How to get rid of weed smell
Invest in air fresheners.
Air fresheners can be used to combat many troublesome odors, including the smell of marijuana. Consider plugging in an air freshener, or placing a new air freshener in a room, shortly after smoking.
If you do not smoke yourself, you can use an air freshener if you notice a fresh scent in the air. You can buy gel-based air fresheners that come encased in a plastic case.