If you want it completely clean and don't care about resin (or have scraped what you can already) then use rubbing alcohol and salt.

Fill the bowl and stem with some salt, pour in some isopropyl, cover the holes with your fingers and shake it for a few minutes. Rinse and repeat.
Nullific Reviewed by Nullific on . Cleaning a glass bowl Ok, I have never cleaned out my bowl because my friend always did it for me (he enjoys doing it). However, since it is summer he is back home and it needs to be cleaned so I tried to clean it on my own today but it's still kind of dirty. What is the best way to clean it? Keep in mind that I live in a dorm so I need a way to do it discreatly. Any advice you might have I would really apreciate!! Thank you!! Rating: 5