What Causes the Sound When Wiper Blades Scrape the Windshield?
1 Answers
The reasons for the sound produced when wiper blades scrape the windshield are as follows: 1. Issues with the wiper blade itself. Wiper blades are made of rubber and can harden or age over time, especially in winter. If they no longer clean effectively, the simplest and most effective solution is to replace them. Generally, wiper blades should be replaced every one to two years. 2. Foreign objects between the wiper blade and windshield. When the wipers are activated, sharp friction noises may occur if there are debris or dirt trapped between the blade and windshield. Inspect and clean the wiper blade or the area beneath it to ensure it remains clean. 3. Deformation of the linkage mechanism or issues with the motor or interval relay. (For example, if the wipers move too fast, too slow, or continuously, it may cause unusual noises.) Long-term use can also lead to deformation, stiffness, rust, or abnormal movement of the mechanism. If you've recently replaced the wiper blades, check for dirt or oil residue on the windshield. Clean the glass with a cleaning solution or try another new set of blades. If the noise persists, use pliers to adjust the angle of the wiper arm. 4. Incorrect angle between the windshield and wiper arm. In most cases, the sound occurs due to misalignment of the wiper arm, causing the blade to bounce on the windshield. If the blade is in good condition, adjust the angle of the wiper arm so that the blade is perpendicular to the windshield. You can use pliers to adjust it yourself: place a cloth under the head of the wiper arm, grip it with pliers, and gently bend it to ensure the blade is perpendicular to the windshield.
