How do you remove marijuana from hair?

If you have marijuana in your hair the simplest solution would be shower, if you're talking about drug testing keep reading...

If you haven't smoked recently it should be gone with 2-3 days. Constant users are detectable up to several weeks, longer than any other illegal substance is detectable.

Your best defense:

1) Shave your head. No hair, no marijuana!

2) Switch to harder drugs.

3) Wear a wig made of REAL HUMAN HAIR. Nothing fake or polyester, those tests sample the pH and they'll know something fishy is going on when they find out that they have a sample of your cat's/ferret's/barbie doll's hair.