What Causes the Windshield Wiper to Become Blurry After Wiping?
2 Answers
If the windshield becomes blurry after wiping, it may be due to a faulty wiper. The working principle and function of windshield wipers are introduced as follows: Working Principle of Windshield Wipers: The working principle of windshield wipers refers to the process where the driver operates the wiper handle, sending a demand signal to the BCM (Body Control Module). The BCM then inputs a start signal to the wiper motor, which controls the wiper arm to perform the corresponding action. Function of Windshield Wipers: The function of the wiper is to remove raindrops and dust attached to the vehicle's windshield, thereby improving the driver's visibility and enhancing driving safety.
I've encountered the annoyance of blurry wipers many times, especially when driving in the rain when it's hard to see the road clearly. The main reason is that the wiper blades have become stiff or cracked after prolonged use, and the rubber has aged, losing its elasticity, leaving water streaks that appear blurry when wiping. The oil film on the windshield is also troublesome—it's a greasy layer formed by car exhaust and road dust, reflecting sunlight and further impairing visibility. The solution is simple: regularly use glass cleaner or white vinegar to wipe the glass and remove the oil film, and replace the wiper blades every six months or so to ensure a good fit. Also, check if the wiper arm is loose; if the pressure is insufficient, adjust the screws to increase the force. Driving with blurry wipers is dangerous, so it's best to slow down and use fog lights in emergencies—don't wait for a major accident to regret it. Developing maintenance habits saves money and ensures peace of mind.
