All I know is I had about 2 weeks for mine (my test is this thursday) and all I did was drink about 2 liters of water a day and pissed my balls off.. I bought a drug test about a week ago.. and I was dirty.. and so I kept drinking the 2 liters a day and pissing non stop.. and well I bought a drug test yesterday and did it again and BOOM clean.. so tomorow I'm gonna piss in the fuckin judges mouth. :]