on a more specific note. u will need to follow directions thoroughly. the times on the box are there for a reason. also read the bold print u need to use a new comb or brush, a freshly washed and dried towel. just washed clothes. if u normally wear a hat don't. if u are required to wear glasses at all times clean them especially the rubber covered ends that touch ur ears. use rubbing alchol. and the most important DO NOT GO AROUND SMOKE AT ALL if u wash ur hair and walk out into smoke u just wasted ur money. hair is like a sponge soaking up everything it comes in contact with. no hair dryers either for ne one else out there wondering the same question. if u wear jewelery clean that as well with ur normal cleaner. u can smoke all the way up till the day of ur test. and the day of, don't just for the simple fact of keeping the air clean fer sure. o and ur hair has to be an inch or longer. SO DON'T CUT UR HAIR
all will be fine, trust me
KT