acdii Report post Posted June 10, 2013 Rain-X or just waxing the glass surfaces. I might not bother waxing the car anymore now that I've learned about Zaino but I might still wax the glass to keep the water beading up nicelyIf you have AIO you can use that on the glass too. They say its good for all surfaces except porous ones. Quote Share this post Link to post Share on other sites