Why is there a noise when the wiper rubs against the windshield?

[Bethany]

The reasons for the abnormal noise when the wiper rubs against the windshield are as follows: 1. The wiper blade itself causes the noise. Wiper blades are rubber products and will age and harden over time, especially in winter. If it no longer cleans effectively, the simplest and most effective solution is to replace the wiper blade. 2. Foreign objects between the wiper blade and the windshield cause the noise. When the wiper is turned on, a sharp friction sound may occur between the wiper blade and the windshield. Check for any foreign objects on or under the wiper blade and ensure the wiper area is clean. 3. The noise comes from the friction of the wiper linkage bushing. Over time, the wiper linkage mechanism may age, the wiper arm spring may lose elasticity, and the bushing may wear out or even fall off. 4. The noise originates from the wiper motor. If the motor itself is making noise, it could be a sign that the motor is nearing the end of its lifespan.