This is annoying, somehow my wiper arm (the metal blades which hold the rubber insert) managed to scrach the far right of the winshield. It's this awful looking swirl, just like my back windshield rainbow scratch. It blows that after reading the posts, I replaced the blades, but, still got screwed. I commute 60 miles a day all highway, I am not replacing the windshield till I get major damage.