Hey all, I'm not sure if anything like this has been posted before but I just made a wonderful discovery that I think needs to be shared. I recently bought a little zong (just big enoug to hold one or two ice cubes) and quickly realized that they cant be cleaned with any of the pipe cleaner round brush on a stick style things. I tried just filling it with rubbing alcohol and shaking it with little success, it took the gross dirty bong taste away for a couple days but never really got it clean. So what I did is throw a bunch of old (well cleaned hehe) aquarium rocks in with some rubbing alcohol (the 99% stuff!) and gave it a shake for a couple minutes. It was amazing, it was as clean as the day I bought it and way cleaner than my old bong that i cleaned with alcohol and above mentioned brush ever was! Hope this helps someone
-Doyu
-Doyu