Smoke can cling to fabrics and isn’t easily washed out of things like curtains and mattresses. The next time you smoke in your room, take an empty paper towel roll, a rubber band, and three or four dryer sheets to make what’s called a “sploof.”
Take one dryer sheet and place it over one end of the paper towel roll. Secure the dryer sheet in place with the rubber band. Crumple up the remaining sheets and place them inside the tube. When you smoke, blow through the tube, and it’ll help serve as a filter to make your smoke smell a bit more like fresh laundry than pure weed.