First time / long time…
I’ve got cloudy white film on a lot of our glassware here, specifically round bottom flasks used for distillation and on the rotovap. We typically wash our flasks with acetone followed by an ethanol rinse before they go to the drying rack. I have tried a few things to get rid of this staining: a DI water rinse, hexane in case it was vacuum grease, a hot alconox bath and now I am out of ideas.
Has anybody dealt with this? It’s driving me crazy!
Thanks in advance!