2000 Subaru Impreza Owner's Manual - Page 112

NOTE D The wiper operates only when the ignition switch is in the "ON" or "ACC" position. D Clean your wiper blades and window glass periodically with a washer solution to prevent streaking, and to remove accumulations of road salt or road film. Keep the 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 blades results in jerky wiper operation and streaking on the glass. If you cannot remove those streaks after operating the 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 window glass and wiper blades with clean water. The glass is clean if no beads form on the glass when you rinse with water. D If you cannot eliminate the streaking even after following this procedure, replace the wiper blades with new ones. Refer to the "Wiper blade replacement" section (chapter 10) for replacement instructions. J Windshield wiper and washer switches B Windshield wipers HB2019BB 3-18