Not that the idea suffers from its simplicity, mind you; it just removes unpolymerized resin from the isopropyl alcohol rinse using the same photopolymerization process used during printing.

You can remove residue with rubbing alcohol. Alternatively, you can wipe residue away with oil, then rinse gently with soapy ...

Once the resin is loosened, empty the cleaning solution and rinse all parts of your bong with hot water. Be sure to remove any residue from the rubbing alcohol, salt or baking soda. Repeat the ...