[header] How to get rid of weed smell [title] Invest in air fresheners. [step] 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. [substeps] You can buy gel-based air fresheners that come encased in a plastic case.