I have already tried this, and used every type of scrubber/brush aside for anything that could scratch the glass, and every type of solvent aside for the basic ones which would eat away at the glass. I can’t have my flasks failing under vacuum during a run. Doing a distillation run doesn’t seem to get rid of these plaques/stains either.
I’m a certified bong cleaner/volatile stripper.
have you tried hitting the flask with some hot canada oil?
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Nice! Guessing you mean canola oil? How hot are you getting it?
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Yup! It’s not something normally I need to use. But for this flask it definitely helped. everything drained out w/ heat and just walls were coated.
I didn’t actually hit it with a temp gun so not sure if the actual temp, prob like 300-400ml of canola in the dirty flask, then threw everything in microwave for about a 2min blast (1250W).
It definitely cleaned up just from heating and shaking/agitating the flask but to actually get this clean I also used the bottle brush while the hot oil was sitting in the flask, I put the flask on an aluminum ring for a mason jar or a cork stand and slowly rotate as I scrub with the bottle brush, and took a few passes as well as working/letting the oil sit on problem areas. It probably took me like 1hr15min of physical effort lol but my flask is clean.
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Warm canola … why yes I have
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