What Causes the Windshield to Appear Blurry After Wiper Operation?
2 Answers
Windshield appearing blurry after wiper operation indicates potential wiper malfunction. Below is an introduction to the working principle and function of windshield wipers: Working Principle of Windshield Wipers: The working principle refers to when the driver operates the wiper control stalk, sending a demand signal to the BCM (Body Control Module). The BCM then transmits an activation signal to the wiper motor, which controls the wiper arm movement to perform corresponding actions. Function of Windshield Wipers: The wiper system is designed to remove raindrops and dust particles adhering to the vehicle's windshield, thereby improving driver visibility and enhancing driving safety.
When it comes to the wipers still leaving a blur after wiping, I often encounter this issue after driving a lot. The most common cause is aging, hardening, or cracking of the wiper blades. When the rubber material fatigues, it doesn’t wipe cleanly, leaving water streaks and stains. Another culprit is the buildup of oil film on the windshield—exhaust fumes and dust in the city settle on the glass and mix with rainwater, making it even more smeared. Additionally, insufficient or uneven pressure from the wiper arm can lead to incomplete wiping. In winter, freezing or moisture residue can also leave blurry water marks after wiping. Personally, I replace my wiper blades every six months, opting for silicone material. When washing the car, I use soapy water to clean the glass and remove grease. Before it rains, I spray anti-fog spray as a preventive measure. Safety comes first—when visibility is poor, slow down or stop to check to avoid accidents.
