screw rain-x man, just wax your windshield. Works just as good, I guarantee you. water beads up and flys off while your driving. I just waxed my windshield, moonroof and the rear windshield with some Meguiar's wax. However I did just purchase some rain-x wiper blades. Heard they were the best (for the money). cant wait to test them out. Although I probably won't need them now. hahaha.