i know im being paranoid....but i really dont want to fail a drug test and lose this job just cause i smoked once!! there really isnt much information online about first time smokers. what i understand for hair samples they clip only like 3/4" of hair, so will that be "clean" hair?? the only reason i ask is that the hair cleaning methods discussed on these boards seem a bit harsh and if i really dont need to do that i would like to avoid it.