are you living in a dorm?
roll up a towel for the door crease and fill a t.p tube with dryer sheets...exhale your 'dro smoke through it and it will cleanse the smell
I was in a taxi in Las Vegas a few years back and the woman driving had the AC on full blast. Said it was to keep her awake!!! My confidence in her getting me there in one piece rocketed at that point I can tell you!