i dont know.. i heard somewhere ( i was reading up on drug tests because i was paranoid about getting tested in school ) anyway.. i heard that drinking water doesnt really "clean out your system" because the thc is stored in your fat cells.. i heard that all water does is delude the piss so that the thc cant be traced, but when you do that you should take vit B pills so that your piss stays yellow.

or something.. i dunno i heard that exercising helps.