If you use a bong to smoke anything resinous, wash it often. It's really easy:
• Wear nitrile/latex gloves for non-slip handling of glass.
• Put bowl and slide in a sealable bag – one at a time if fragile.
• Add kosher salt to both bag and bong.
• Pour in some rubbing alcohol. 70% will do, but you can get 99% online.
• Seal the bag, then shake the devil out of it.
• Stop up any openings (with a finger or your palm) and shake the bong the same way.
• Rinse it all out. It's like brand new!