Two things I use on glasses, binocs, and scopes: Either tissue paper (not Kleenex, but the type of stuff used as filler in gifts) with optic spray sold by eyeglass place, or my favorite: a clean, dry piece of microfiber clothe.
Good microfiber has some amazing properties and seems to lift everything off the glass without any chemicals that could possibly damage coatings. Plus you don't have to have a bottle of stuff lying around to dry out, leak, or be forgotten. If you're having a problem getting microfiber clothe check out your local music store. We sell them for cleaning instruments.