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Vinyl polish and UV protectant products will keep the panels crystal clear and prevent the sun from damaging the surface. You will extend the life of your vinyl windows by using these products after each cleaning. Follow the manufacturer's directions for the particular product you're using, since application techniques may vary from product to product. Vinyl windows are made of very resilient materials that can withstand deterioration that sunlight causes over time. To keep them in tip-top shape, clean your vinyl windows at minimum twice per year. If your windows have become particularly dirty after a storm or for some other reason, try to clean them up as soon as possible. Never use petroleum-based cleaners, caustic chemicals, razor blades, putty knives, abrasive pads, paper towel, or high-pressure water hoses on your vinyl windows.
Apply a UV protectant to the glass after each cleaning. Clean your windows at least twice per year. Avoid using any and all abrasive materials.