Can salt scratch my coatings of lenses? I received my new prescription eyeglasses a week ago, after I had ordered it half a month ago, the shipping speed is normal and I really love this style, but the problem is my AR-coatings have been scratched and damaged among a month later, my friend remind me that maybe because I always wear them for swimming at the beach, at cloth the lenses with grain of salt, which may damage the coatings! Is that true, what can I do with my new eye wears?