1999 Subaru Impreza Owner's Manual - Page 126

Instruments and controls D Clean your wiper blades and windshield periodically with a windshield washer solution to prevent streaking, and to remove accumulations of road salt or road film. Keep the windshield washer button depressed at least for 1 second so that washer solution will be sprinkled all over the windshield or rear window. D Grease, wax, insects or other material on the windshield or the wiper blade results in jerky wiper operation and streaking on the glass. If you cannot remove those streaks after operating the windshield washer or if the wiper operation is jerky, clean the outer surface of the windshield (or rear window) and the wiper blades using a sponge or soft cloth with a neutral detergent or mild-abrasive cleaner. After cleaning, rinse the windshield and wiper blades with clean water. The windshield is clearn if beads do not form when you rinse the windshield with water. D If you cannot eliminate streaking even after following this method, replace the wiper blades with new ones. Refer to the Wiper Blade Replacement section (chapter 10) for replacement instructions. J Windshield wipers and washer switch B Windshield wipers OFF INT Mist LO HI HS0060 To turn the wipers on, push the wiper control lever down. : Intermittent LO : Low speed HI : High speed - CONTINUED - 3-21