Ok, the best way to pass a drug test ( I have done it numerous times and I am sure it works) take a visine bottle (I always carry one around with me for school random drug tests it's gay I know but my shcool is lame. You can piss in the cup and then drop maybe about 10-15 drops in just to be safe or more if you smoked the day before or the day of. If this doesn't work then well I'm sorry but it has always worked for me. For hair testing there is always detox which is what I'm about to get from my sis. And if thier desperate cops or whoever they will take any pubic hair (beard, dick/vagina, armpits etc) . But they NEED 1/2 an inch or more to even have the drug test so that would take a lot of nose hairs and I don't even know if those are good enough. They won't shave your eyebrows though cause that can be considered abuse for making them look stupid. I don't know, don't ask me. anways, there you go. All I know about drug tests cause it's happened to me a lot. visine, 10-15 drops usually and for hair just shampoo or shave everything but that is suspicious and they will just postpone the date of drug testing.