What Causes Wiper Blade Chattering and Noise?

[DiIsabella]

There are three main causes for this phenomenon. Here are the detailed explanations: 1. Aging, deformation of the wiper blade itself, or foreign objects between the blade and windshield: First, check for any foreign objects between the wiper blade and windshield. Then, lift the wiper to the service position and inspect the rubber part of the blade for hardening, burrs, notches, cracks, or tears. If any of these are present, the wiper blade needs to be replaced. If there are only burrs, you can gently sand them twice with 1000-grit sandpaper and test again. 2. Oil film on the windshield: Perform a water spray test on the windshield. If you notice that water does not bead up or spreads out quickly, it indicates the presence of an oil film, which causes the wiper blade to chatter or make noise. In this case, use an oil and adhesive remover to clean the windshield. 3. The wiper arm's downward pressure is not perpendicular to the windshield surface: This causes friction noise when the wiper blade moves up or down. You can remove the wiper blade, place a piece of cardboard on the windshield, and gently lower the wiper arm onto it to check if the arm's lower surface makes full contact. If there is an angle, it means the wiper arm is bent and can be adjusted with a wrench. When adjusting, wrap the wiper arm with a thick towel to prevent the wrench from damaging the paint.