Rubbing alcohol and salt for the resin
The other problem with a bong is eventually you get mineral deposits from the water like with a pot you boil water in, especially if you have percs. Hot vinegar is what I use for it
This is what most of my friends do. Works good with that course salt.That (denatured) ethanol+ salt shake/scrub trick is really a good one
glad i read it somewhere years a go, probably at icmag
It works so well for larger glass bongs with round chambers, for places where you can’t get a brush
I should clean my bong more often... when it's still easy ..ha ha and coarse sea salt shake is the best trick against alll the tar