Yeah just went to the local head shop and picked up some zydot ultra clean shampoo. It says works best 24 hours before the test. I read some crazy shit about bleaching and dying and baking soda... But I have an uncle who is a heavy hitter (lol) and he did zydot the night before his test and passed. All I been seeing though is people saying it doesn't work.... I'm going to just go for it I'll post results here if anyone's interested.