You’re basically inviting germs to party on your face.” The good news: Keeping your glasses clean is a relatively easy chore.

Join 7 million other satisfied buyers and toss the smudge- and streak-creating cloths and sprays once and for all.

which scratch more easily than glass. Clearly, you need to protect your investment. But should you clean lenses with tissues or cloth? When they're wet or dry? Industry insiders put things into ...