the ammount of water that people end up drinking with that snake oil and different metabolism rates are the reasons those bogus cleen products work, quitting or substituting is the ONLY way to pass, 3 weeks should be enough for you to be cleaned out, be warned...taking a test 1 day, smoking a j that nite, the test 1 week later will show that u smoked, if all else fails tell the man what he wants to hear..." I have to be completly honest with you, when I stopped going to my 12 step meetings, I had a relapse and smoked some pot, my sponsor is making me go to meetings everyday now and we are working on my steps" trust me im sure he has heard the old " i was in a car where some was smoked" good luck, don't worry pot will still be here when probation isnt. l8r