Use only on glass lenses. It will scratch plastic or polycarbonate lenses.

You’re referring to plastic or polycarbonate lenses (anything but glass). You can safely use an abrasive cleaner on glass lenses. I was shocked to hear somebody say to use Lava soap on my glasses, but I figured I had nothing to lose (they got spotted by the cleaner at a car wash, and nothing else worked). I lathered…