2004 Honda Civic Owner's Manual - Page 159

Windshield Washers Check the level in the windshield washer reservoir at least monthly during normal usage. On Canadian models: The low washer level indicator will light when the level is low. Fill the reservoir with a good-quality windshield washer fluid. This increases the cleaning capability and prevents freezing in cold weather. When you refill the reservoir, clean the edges of the windshield wiper blades with windshield washer fluid on a clean cloth. This will help to condition the blade edges. NOTICE: Do not use engine antif reeze or a vinegar/water solution in the windshield washer reservoir. Antif reeze can damage your vehicle's paint, while a vinegar/water solution can damage the windshield washer pump. Use only commercially-available windshield washer f luid. 156 Maintenance