By the way, I found in reference books on optics that acetone is a
safe product to use on glass if you want to clean fungus. To be used
pure unless the lens is a doublet (or a triplet) when it have to be
diluted 1:1 with water. I'm not sure this is enough to really wipe
out all fungus though.
Another recipe mentionned on the web was ammonia & peroxyde d'H 1:1.
Andre
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