Filters only when the light needs filtering.
For lens cleaning, a good quality 1-inch camel's hair paintbrush with the
handle cut off, stored in a zip-lok bag and washed frequently. For the
occasional smudge or inadvertent fingerprint, I carry a small screw-top
bottle of Windex and about 8 feet of Charmin in the bag with the brush.
This high-tech stuff works like a charm. My lenses are perfect, and some
I've had 30+ years.
As a bonus, in an emergency, the Charmin can do double duty, although I
wouldn't recommend using it for lens cleaning afterwards.
Walt
I realize that the coatings and lenses are different for eyeglasses,
but ammonia is supposed to strip non-reflective coats right off.
Windex has ammonia. Do your outside surfaces still have their
coatings?
--
Winsor Crosby
Long Beach, California
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