What is the reason for the middle part of the wiper blade not cleaning properly?
2 Answers
If the wiper blade is intact but the middle part does not clean properly, it is likely due to the angle of the wiper arm. Adjusting the wiper arm can resolve the issue. If the spring is too tight, you can loosen the distance between the springs. During daily use, ensure the rubber wiper blade remains adequately moist. Only with sufficient moisture can the wiper blade maintain excellent flexibility and ensure tight contact with the windshield. If there is insufficient water on the windshield before use, dry wiping can have the opposite effect. Below are the reasons why the wiper blade may not clean properly: 1. Dirty windshield: If the windshield is not cleaned thoroughly during car washing, tiny tar particles or other debris can adhere to the surface, reducing its smoothness. A rough windshield surface not only prevents proper cleaning but can also damage the wiper blade. 2. Rough wiper blade rubber: With proper maintenance, the original wiper blade rubber can last up to 5 years. It is important to promptly remove fine sand particles from the wiper blade rubber. Wiping with these particles is equivalent to grinding the wiper blade rubber with a sandpaper. Over time, the smoothness will degrade, and a rough wiper blade will certainly fail to clean rainwater effectively.
As someone who frequently works on my own car, I've found that the main reason why frameless wipers don't clean the middle area well is usually because the rubber wiper blade in the center has hardened or worn out. Over time, the rubber deteriorates and loses its elasticity, especially after prolonged sun exposure or in cold winter temperatures, making it brittle and unable to evenly conform to the curvature of the windshield. This results in insufficient pressure in the middle, leaving water streaks behind. Another common issue is the buildup of oil film or dust on the windshield surface, which affects the wiper's contact with the glass—I recommend using a specialized glass cleaner for a thorough wipe, as this often solves the problem. Improper installation can also be a factor; if the wiper arm isn't securely fastened, the pressure distribution becomes uneven, so always ensure the correct angle when replacing wipers. From my experience, regular inspection and replacement of wipers are crucial—typically every six months or 10,000 kilometers. If the problem persists, it might be worth checking for scratches or unevenness on the windshield itself, as these can affect overall performance. Ignoring small issues can lead to blurred vision while driving, which poses safety risks.
