Subaru Impreza Manuals 2017 Impreza Owner's Manual | Page 406

11-30 Maintenance and service/Replacement of wiper blades temperature, it may freeze and block the nozzles. CAUTION . Adjust the washer fluid concen- tration appropriately for the out- side temperature. If the concen- tration is inappropriate, sprayed washer fluid may freeze on the windshield and obstruct your view, and the fluid may freeze in the reservoir tank. . State or local regulations on volatile organic compounds may restrict the use of methanol, a common windshield washer anti- freeze additive. Washer fluids containing non-methanol anti- freeze agents should be used only if they provide cold weather protection without damaging your vehicle’s paint, wiper blades or washer system. Replacement of wiper blades 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 the 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 clean if beads do not form when you rinse the windshield with water. CAUTION . Do not clean the wiper blades with gasoline or a solvent, such as paint thinner or benzine. This will cause deterioration of the wiper blades. . While removing the wiper blades from the wiper arms, do not return the wiper arms to the original positions. Otherwise, the windshield surface may be scratched. . When returning the raised wiper arms to the original positions, carefully return the wiper arms on the windshield by hand. You should not return the wiper arms to the windshield only by the return spring. Otherwise, the wi- per arms may be deformed and/ or the windshield surface may be scratched. If you cannot eliminate the streaking even after following this method, replace the wiper blades using the following proce- dures. & Windshield wiper blade as- sembly 1. Raise the wiper arm off the windshield.