1996 Chevrolet Astro Owner's Manual - Page 260

Care of Safety Belts Keep belts clean and dry. Glass Glass shouldbe cleaned often. GM Glass Cleaner(GM Part No. 1050427) or a liquid household glass cleaner will remove normal tobacco smoke and dust films. Don't use abrasive cleaners glass, because they may cause scratches. on Avoid placing decalson the inside rearwindow, since they may have to be scraped off later. If abrasive cleaners areused on the inside of the rear window, an electric defogger element may be damaged. Any temporary license shouldnot be attached across the defogger grid. Cleaning the Outside the Windshield, of Backglass and Wiper Blades If the windshield is not clear afterusing the windshield washer, or if the wiper blade chatterswhen running, wax or other material may be on the blade or windshield. Clean the outsideof the windshield with GM Windshield Cleaner, Bon-Ami Powder@ (GM Part No. 1050011). The windshield is clean if beads do not form when you rinse itwith water. Clean the blade by wiping vigorously with a cloth soaked in full strength windshield washer solvent. Then rinse the blade with water. Wiper blades should be checked on a regular basis and replaced when worn. Weatherstrips Silicone greaseon weatherstrips will make them last longer, seal better, and not stick or squeak.Apply silicone greasewith a clean cloth at least every six months. During very cold, damp weather more frequent application may be required. (See "Recommended Fluids & Lubricants'' in the Index.) 6-52