dude
Im the master. all my friends bring me their bongs to clean. you take rubbing alcohal and pour half the bottle in the bong. use you thumb to seal the steam. pour a shit load of salt in it. cover the top with your hand and shake the shit out of it until all the resis is off the glass, pour liquid out and repeat with hot water. Take the bowl and soak it in the salt and alcohal solution and take a q tip and rub off. easy as 123, please post results, I should sell this advice.......