1999 Subaru Legacy Owner's Manual - Page 134

D Do not operate the washer continuously for more than ten seconds, or when the washer fluid tank is empty. This may cause overheating of the washer motor. Check the washer fluid level frequently, such as at fuel stops. D Do not operate the wipers when the windshield or rear window is dry. This may scratch the glass, damage the wiper blades and cause the wiper motor to burn out. Before operating the wiper on a dry windshield or rear window, always use the windshield washer. D In freezing weather, be sure the wiper blades are not frozen to the windshield or rear window before operating the wipers. D Do not operate the wipers if the wiper blades are frozen to the windshield or rear window. If the wiper would be operated with the wiper blades frozen to the windshield or rear window, the wiper blades could be worn or damaged prematurely, resulting in streaking or incomplete wiping. Be sure to use the defroster or wiper deicer (if equipped) or rear window defogger, if the wiper blades are frozen to the glass. D Do not clean the wiper blades with gasoline or a solvent, such as paint thinner or benzene. This will cause deterioration of the wiper blades. NOTE D The wiper operates only when the ignition switch is in the "ON" or "ACC" position. 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 CAUTION 3-18