Q-Tips and vinegar are your friend. There comes a time when even the gnarliest stoners must admit to themselves that a pipe, bong, or vaporizer needs to be polished off. While cleaning isn’t typically mentioned on the list of fun stoner activities, it’s a pretty painless endeavor that’s going to make the quality of your next sesh so much better, which is why we made you this guide to cleaning any type of piece you’re…