1998 Chevrolet Venture Owner's Manual - Page 386

Cleaning Glass Surfaces Glass should be cleaned often. GM Glass Cleaner (GM Part No. 1050427) or a liquid householdglass cleaner will remove normal tobacco smoke and dust filmson interior glass. Don't use abrasive cleaners on glass, because they may cause scratches. Avoid placing decals onthe inside rear window, since they mayhave to be scraped off later. If abrasive cleaners are used on the inside of the rear window, an electric defogger element may be damaged. Any temporary licenseshould not be attached across the defogger grid. of the windshield with GM Clean the outside Windshield Cleaner, Bon Ami@Powder (non-scratching glass cleaning powder), GM Part No. 1050011. The windshield is clean if beads do not form when you rinse it with water. Grime from the windshield will stick to the wiper blades and affect their performance. Clean the blade by wiping vigorously with a cloth soaked in full-strength windshield washer solvent. Then rinse the blade with water. Check the wiper blades and clean them as necessary; replace blades that look worn. Weatherstrips silicone grease with a clean cloth at least every six months. During very cold, damp weather more frequent application may be required. (See "Recommended Fluids and Lubricants" in the Index.) Cleaning the Outside of the Windshield, Silicone grease on weatherstrips will make them last longer, seal better, and not stick or squeak. Apply Backglass and Wiper Blades If the windshieldis not clear after using the windshield washer, or if the wiper blade chatters when running, wax, sap or other material may be on theblade or windshield. 6-51