To determine whether windshield wipers need replacement, a comprehensive assessment should be conducted from three aspects: visual inspection, auditory observation, and wiping performance. First, check if the wiper blades have cracks, deformations, or hardening, as these physical damages will directly affect the water-wiping performance. Second, if abnormal bouncing or metal friction sounds are heard when the wipers are activated, it usually indicates that the connection between the rubber blade and the frame has loosened. The most critical step is the actual test: after spraying cleaning fluid, observe whether the windshield has more than four permanent scratches or over twelve temporary water marks. Windshield wipers are consumable parts, and It is best to replace them every 12 to 18 months. During daily maintenance, dry wiping should be avoided, and the oil film and sand particles accumulated on the surface of the rubber blades should be cleaned regularly with glass cleaner. Low temperatures in winter accelerate rubber aging; if the rubber blade becomes hardened and loses elasticity, it should be replaced in advance even if the service period has not been reached to ensure clear driving visibility in rainy weather.
