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Summary: Start by spraying glass cleaner liberally over the windshield. Get tips on how much glass cleaner to use before applying "Rain-X" to a car windshield from an automotive expert in this free car maintenance video.
Nathan McCullough graduated from Nashville Auto-Diesel College with a GPA of 3.5 and received their Craftsmanship Award and Honor Seal. He has managed several automotive facilities...read more
"In this clip we're going to talk about the proper method for "Rainxing" the outside of your windshield and the inside as well. In this step, we're going to talk about the proper procedure for cleaning your outside windshield and applying the Rain X repellent. What I'm going to do is take my bottle of heavy duty glass cleaner and spray it liberally all over the surface of the windshield. Now, it's imperative, to get your windshield as clean as absolutely possible. If you have road grime or dead bugs and things of that nature on it, the sealant won't be able to get on the glass and cure the way it should. We're going to spray it down and let it soak for a little while. Approximately fifteen seconds. What you're going to do is in a circular pattern, with one of your clean, cotton cloths, take and clean your windshield. "
eHow Article: "Rain-X": Using Windshield Glass Cleaner