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Stupid question, How and what do you use to clean the inside sapphire crystal?


Prsist

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Ome rubbing alcohols have scents and oils which don't so much for a streak-free cleaning. Windex is fine as you don't put it back together wet...

My optometrist told me never to use windex on my AR coated glasses. and to stick to eyeglass cleaner.. I'm guessing the same would go for AR coated watch crystals... If the crystal isn't coated I'm guessing Ammonia is fine, but in general, continued application of ammonia on ar surface isn't supposed to be good. I've never tried it, but just what my optometrist told me not to do :whistling:

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