I use alcohol but make sure you dry it off. You need little to no pressure.
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Suggest you use pure acetone instead of rubbing or isopropyl alcohol because of this definition:
"Isopropyl Rubbing Alcohol, USP / B.P. contains 68-99% of isopropanol (isopropyl alcohol) by volume, the remainder consisting of water, with or without color additives, suitable stabilizers, and perfume oils."
You don't want "perfume and oils" so stick with pure acetone. You can find this very inexpensively at your local drugstore in the nail polish remover section.
Thanks for the tip but I just read the ingredients on my bottle of 70% isopropyl alcohol and it states 70% isopropyl alcohol and 30% water - nothing else. I do get the sale stuff so I would have to assume that more expensive alcohol may contain stabilizers, perfume oils or color additives. My stuff is clear. I wouldn't think the stabilizers are a problem but could be wrong. I also use it for cleaning my air cleaners.
Myself, CD with physical brushes attached, and compressed air.
Not certain of isopropanol or any other solvent for that matter (I'd be concerned with the mount of the lens rather than hurting the lens itself, but a 99% USP grade isopropanol is also available at most drug stores; you just may have to ask for it.
You're welcome, but 70% is not pure and I wouldn't trust their definition of "water" (yes I'm a cynic from way back :). Use what you want, but I have only ever used pure isopropyl (which you generally have to ask for) or pure acetone, which you can find on the shelf.
Good luck and hope you get it working right!