Does your house smell of weed? Are you parents about to visit? I have stumbled across a type of tea that tastes great but also according to my housemates, smells of weed. So, if you have guests who don't approve, just let them smell the tea and they will think all the smell came from the tea and not from any more sinister sources. It is
Oolong +Raspberry from Birt and Tang who, by the way, make other excellent tea too.
NB. This will not remove the smell, nor is it a guaranteed solution. If it doesn't work, remember that it was all martin's idea, not mine!