To inspect car windshield wiper blades, a comprehensive evaluation from multiple aspects is necessary. If resistance or unusual sounds occur, the wiper arm pressure may require adjustment. Next, examine the wiping performance: if the windshield displays more than three fan-shaped water marks, streaky residues, or serrated wear along the rubber blade edges, this indicates rubber deterioration and necessitates replacement. For manual inspection, lift the wiper blade and gently pull the rubber element sideways with your fingers; if the rebound time exceeds two seconds or surface cracks/hardening are present, immediate replacement is required. Furthermore, if the wipers demonstrate uneven movement, skipping, or incomplete contact with the glass surface across different speed settings, this suggests potential mechanical component corrosion or binding issues. Regular replacement every 10,000-20,000 kilometres or annually is recommended. For routine maintenance, clean the rubber surface with a soft, damp cloth to remove dust, avoid corrosive cleaners, and raise the wiper arms when parked to minimize heat-induced rubber degradation. Prior to the rainy season, conduct thorough water-clearing tests to ensure optimal driving visibility and safety.
