Hey guys I was wondering if you guys can give me some advice on CERTO. I am being drug tested sometime tonight by my parents and at 4:00 cst i drank CERTO. I am a daily smoker. Im 16 years old, 135 lbs. I have heard and read that CERTO is supposed to give you a 1-2 hour window in which to pass a drug test. As far as I know you are supposed to mix it and drink it an hour before your drug test, then drink water, then piss once or twice before your actual test. My parents can test me at any time tonight so I figure that if I drink more certo around 6 i should be set for the rest of the night seeing that my parents go to bed around 8:30. I have read that CERTO has worked for many people. If anyone knows anything about CERTO or has used CERTO before and was successful please let me know and post me some feed back. Thanks.