Why is the wiper sound loud?
2 Answers
There are three main reasons for loud wiper sounds: 1. Normal break-in noise from new wipers - they still clean effectively and the sound isn't sharp. The blade structure differs between beam-style and conventional wipers. About 90% of beam-style wipers use horizontal multi-layer rubber strips for wiping. When the first layer has already cleared all rainwater, the subsequent layers may scrape against dry glass, creating noise. 2. Incorrect blade alignment - may cause incomplete cleaning during one stroke with sharp noise. This usually indicates an installation angle deviation in the wiper arm, creating an improper contact angle between the rubber and windshield. 3. Blade edge issues - caused by aging or defective products, producing sharp noise with vibration and poor cleaning in both directions. After prolonged use, about 30% of oxidized wiper rubbers develop similar problems.
As a seasoned driver with years of experience, I find that loud wiper noise is quite common, often due to aging wiper blades where the rubber hardens or cracks, causing a screeching sound on the glass. Another issue is an unclean glass surface, such as buildup of oil film, dust, or bird droppings, which increases friction and naturally produces noise. If the installation is loose or the pressure is uneven, the wiper arm may wobble noticeably during operation, amplifying the noise. Personally, I usually start by thoroughly cleaning the glass with water and a cloth, then apply some wiper cleaner evenly—this trick works quite well. If the noise persists, I promptly replace the wiper blades, which are inexpensive and widely available; replacing them annually ensures safety. Extra care is needed in winter, as rubber becomes brittle in the cold. Pre-warming the glass with the defroster before activating the wipers helps. Remember not to delay, as driving in the rain with poor visibility due to neglected wipers is a high-risk distraction. Regular inspection and cleaning of the glass are key—simple steps can make driving safer and more comfortable.