this is what i did and it worked GREAT...just fill up a regular plastic kitchen bowl with warm soapy water...let your bowl sit in there for like 20 minutes...i put mine face down in the water...then pick your bowl up and shake it off to get the water out..and scrape the bowl itself with toothpicks..then use Q-Tips (those things you clean your ears out with )..to clean the inside of the bowl..i did this and it worked like a charm
best way to clean it ever.... 1. rubbing alc. 2. any type of salt (I use sea salt) 3.resinated pipe put the salt inside the pipe then put the alch in. or mix the salt and alc. up first and then pour it in. leave some air in there. shake it for a little bit and pour it out (should be brownish) tips 1. use plenty of salt. 2. use every angle you can when shaking it.
Just make sure you rinse it in hot water real well, don't want to be smoking rubbing alcohol. Another way to be sure the alcohol is off the pipe/bong/whatever, is to hold a lighter to it, if the flame doesn't go nuts (it''ll only get real big for a second) on the pipe you're clean.