I'v'e only used this twice on my eye glasses, but here's the story--both my glasses and my daughter's have been getting disgustingly dirty during the day. We each have 2 pairs of glasses, both from different companies., so we know they're dissimilar, and yet they all do the same thing. I ordered this to see if it would help keep them cleaner and/or make cleaning them easier. So far, I've put it on twice. (easy and doesnt' take much at all).
I've gone from cleaning them around every two ...