yes marijuana stays in your system at least for thirty days or more depending on how much a person consumes on a daily basis, the best cure I found for it so it can't be detected is to "eat" one whole head of garlic, if you cut it up into little pieces to chew on it, it won't taste that bad going down, and lots and lots of water with it to wash and flush your system out, at least one to two days before you go to get tested, it works but to smoke the day before or on the day you have an interview is pure suicide, why would you do a fool thing like that, Im sorry to say, but you must of not needed that job that badly. The more water you drink the more you will urinate, and the more you urinate, the cleaner your system is getting.....