My buddy and I just purchased some of the 420 pipe cleaner. Let me tell you, it is shocking. The directions say to shake the bottle and make sure you get the liquid and crystals into all openings of the pipe. Then you shake it for a minute. Now, here is my pipe. It is nicknamed "frosty" and started off clear with a frosted hue to it. After many times smoking it, it turned into a black dark clogged mess. After three rounds of the cleaner, frosty is completely clear already. I am not selling or getting affiliated for this stuff. I just want to let all the other stoners out there of a good quality cleaning product. I know cleaning pipes tends to get annoying. This stuff works.