history: My roommate recently started smoking marijuana and keeps it in my girlfriend's home now. It reeks in the hall and aggravates me in my office as well.
current: I've asked my roommate to keep the smell contained but it still smells strong as we have a smaller 3 bedroom house. Part of the problems is his bed linen and clothes are always dirty.
next: Have you talked to him about being a bit cleaner in general?