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There are ways to clean glass passively, it sounds like your residue is organic.
Hope this helps. (edit: acetate -> acetone, oops) (edit2: 90% -> 70% alcohol per comment)
A note on alcohol as a cleaner:
~~Alcohol is actually a more potent solvent when in solution with water. 70% isopropyl alcohol is so prevalent because it's actually more effective than higher concentrations. ~~
Idk how true that is, it'll be highly dependent on what you're trying to dissolve.
This sounds to me more like the advice I've heard for using isopropyl for sterilizing equipment and surfaces, its more to do with how quickly the pure stuff evaporates. Evaporate too quickly and it doesn't sterilize, whereas 70% is best of both worlds.
Furthermore, for sterilization 70% is more effective because the other 30% is water, which helps ensure everything is exposed to isoprop for long enough and bacterial cells take in the isoprop and die (because water passes through the cell membrane, taking isoprop into the cell with it), rather than 'hunkering down' and surviving until the solvent is gone
However for cleaning electronics, the water content is bad because it does not dry quickly and can cause corrosion, so 99% is needed
So the percentages have varying uses and should be chosen based on the task at hand