Mixgas I have a wild hair....
For cleaning optics why not heat the acetone slightly and pass a little air over it. have the output of that hit the optic and let it fog/condense. Would that not be like making utra pure solvent on the spot from cheap stuff? Then do the same with the methanol. I tried it with ethanol on my glasses and it work very well. Yes they lens is glass not plastic. Tis is kind of like vapor polishing/not.