What Causes the Squeaking Sound When Windshield Wipers Scrape the Glass?

[DelJackson]

Reasons for the squeaking sound when windshield wipers scrape the glass are as follows: 1. Wiper blade issues: Wiper blades are made of rubber and can harden or deteriorate over time, especially in winter. If they no longer clean effectively, the simplest solution is to replace them. Generally, wiper blades should be replaced every one to two years. 2. Debris between the wiper blade and windshield: When the wipers are activated, friction between the blade and windshield can cause a sharp noise. Check and remove any debris under or around the wiper blades to ensure they remain clean.

[WalkerDella]

Last time my car's wipers had the same issue, and I found the main problem was hardened rubber due to aging. The car, parked outdoors for two years under constant sun exposure, had wiper blades that became stiff and screeched when used. Also, uneven spring pressure in the wiper arms can cause skipping—I fixed this by adjusting the spring angle. Another key factor is oil film on the windshield; parking under trees in summer leaves sap on the glass, making wipers streak if not cleaned. I recommend keeping a clay bar to clean the glass every couple of months. For occasional noise, try wiper fluid to soften the blades. If that doesn’t work, just replace them—don’t skimp on safety.

[SanMaximus]

This issue is most likely caused by aged and deformed wiper blades, just like what happened to my old Mercedes. Rubber materials tend to harden and develop ridges over time, causing the wipers to skip and make strange noises when moving. Pay attention to the windshield itself too, especially for vehicles frequently driven in urban areas where oil contamination accumulates heavily. Remember to thoroughly clean it with specialized glass cleaner, otherwise even new wipers won't work properly. In winter, wipers can freeze when frosted - never force them to operate. Additionally, incorrect wiper arm angles may cause uneven pressure distribution, and if the spring loosens, the entire bracket needs replacement. For maintenance, applying rubber protectant can help extend their lifespan.

[Tommy]

Windshield wiper noise is usually caused by rubber blade issues. When I first replaced the wipers on my SUV, they were very quiet, but after six months of driving, they started making noise. Upon close inspection, I noticed that the edges of the rubber blades had worn into sharp angles, causing them to slap against the glass and produce a flapping sound during operation. The condition of the glass surface is also crucial—I use a grease remover to clean the windshield every week when washing my car. Improper installation can also lead to noise; last time I replaced the wipers myself, they weren't securely fastened to the arms, and the noise only stopped after I readjusted them. Avoid using tap water for washer fluid, as mineral deposits can accelerate rubber blade deterioration. Regularly wiping the wiper blades with a damp cloth can help extend their lifespan.