wen u clean ur pipes take it all apart and soke it in some rubbin alchohol for a night than take it out and let the alchohol evaporate..than the stiky black stuff is left, get a razor blade and scrape it out then u can smoke it..it tastes horrible but u get pretty high..if you dont wanna wait for the alchhol to evaporate then set it on fire and blow it out..set it on fire and blow it out, do this till its gone..but BE CAREFUL AND DO IT SOMEWHERE SAFE, my friend has scars on his hands were we spilled the flaming alchohol over.