1993 Oldsmobile Achieva Owner's Manual - Page 256

Service & Appearance Care Cleaning the Top of the Instrument Panel Use only mild soap and water to clean the top surfacesof the instrument panel. Sprays containing siliconesor waxes may cause annoying reflectionsin the windshield and even make it difficult to see through the windshield under certain conditions. Care of Safety Belts Keep belts clean and dry. Glass Glass should be 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 on glass, because they may cause scratches. Avoid placing decals on the inside rear window, since they may have 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 license should not be attached across the defogger grid. Do not bleach or dye safety belts. If you do, it may scverely weaken them. In a crash they might not be able to provide adequate protection. Clean safety belts only with mild soap and lukewarm water. A 254