Ya know, I'm rather partial to the write up on our very own TAC site:
http://observers.org/cleaning.optics.html
It is true that acetone will eat more things that alcohols will, so I think
that's the safer choice. Perhaps the call for reagent grade methanol is a bit
overboard, and some lesser grade would suffice.
I'm gonna try this technique. My favorite EP is a bit grungy after last
weekend's MM!
Tony Hurtado
N8i in Si valley
> Acetone eats plastics and plastic q-tip handles too. Hardware store acetone
> works fine for cleaning laser Brewster windows even though spectroscopic
> grade is recommended for that. Acetone evaporates really fast, faster than
> methanol, ethanol or isopropanol which can all be used to prevent cleaning
> streaks. It also dissolves some things that alcohols don't.
>