hi. my bf has a hair drug test on monday. he used to be a regular smoker. he hasn't smoked in about 60 days. it was only pot that he smoked. i was wondering if anyone here has had to do a hair drug test and if they were able to pass? how did you pass? he is going to use dr. greens wash away shampoo. Anyone here tried it? also, can the lab tell if you use a detoxifying shampoo? thanks!