I had a buddy of mine over and i had a small bag with about .2 grams in it on the table. He sprayed butane into the little baggy, putting quite a bit in there actually, then he started moving it around until all of the butane had dried up, saying some old dude showed him this and told him this was a way to wash dope and what was now left in baggy was pure, clean meth. Is that even possible?!?!!