I've had to fake a test twice, each time I just went to the local GNC store and bought the most expensive clenser/detox drink they had. Worked each time, the first one I was on parole, so I know it was legit. Second time was a few yrs ago for Home Depot lol.. they may not have cared if it was positive, that job lasted about a week before I said fuck it.. took a bunch of shit and bounced.
Most employers will still hire you if you piss positive. Drug test are mandatory for them depending on which state your in.. its just an excuse for the state funded labs to make mony IMO.
Im convinced the detox drinks do work. They usually tell you to chug the bottle, fill it up with water then chug the water.. do it a few hrs before the test, piss in a bush somewhere before going inside.. oh and be sure to drink a bunch of Gatorade as well.. helps with the dilution.
Good luck dude... lol