Use Isopropanol Alcohol (99%) to clean first. I mix in some uncooked rice with it and it cleans the sides quite nicely.

Then after you're done with the Iso, then add the hot water, swish it around really good, and it should come out brand new.
Nochowderforyou Reviewed by Nochowderforyou on . BUBBLER WHATS THE BEST WAY TO CLEAN OUT A BUBBLER? IVE BEEN USING HOT WATER & ITS BEEN WORKIN OK, BUT THERES STILL SOME STUFF AROUND THE STEM & IN THE MOUTHPIECE Rating: 5