removing yellow stains from my clear bubbler

Multan

Well-Known Member
ok so i have a clear glass bubbler. see attached pic. I've tried formula 420, 91% alcohol, and alcohol mixed with salt...but am still having a pretty hard time removing the yellow stains and an area built up in the middle.

I hadn't cleaned my pipe for about 2-3 weeks up until a few days ago. Since then i have been cleaning it after every use and have been unable to get the yellow out. It's been maybe 5-6 uses (so 5-6 washes) and i've used some sort of combination of the above mentioned...and still can't get the yellow out.

I 1st rinse the pipe in piping hot water, then i follow it up with some sort of cleaning solution. Shaking, stirring, and using q-tips to clean the stem. The buildup is not inside the stem, but on the "outter inside".

I guess i'm just looking for input because, i've read how to clean bongs etc, and everyone mentions the same solutions.

Any suggestions on getting it looking NEW again?:roll:

Edit: Stains appear much darker on actual piece than in picture.
 

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