Car windshield wiper blades are a product we’re all very familiar with. I’m sure you’re also aware of their role and functions. Today, let’s talk about several common issues.

　　When using car wiper blades, you’ll often encounter certain issues. Today, I’ve compiled some of the more common ones for you. For instance, the ends of car wiper blades may sometimes curl slightly upward. In fact, most universal wiper blades are designed based on the typical curvature of windshields found in most vehicles—and they’re not specifically tailored to any one model. So, when the windshield curvature of a very rare vehicle is excessively large, you might notice this slight upward curl at the blade’s ends. But don’t worry—this won’t affect the wiper’s performance. If it does happen, simply reduce the blade size by one size, and that should do the trick. Another issue is that the middle section of the wiper blade fails to make proper contact with the windshield. If you run into this problem, remember that over time, the wiper blade itself will inevitably lose some of its pressure due to wear and tear. If you’d like to fix this issue, you’ll need to go to an authorized 4S store to replace the rocker arm spring. On the other hand, some vehicles suffer from inherently insufficient pressure right from the start; for these cars, you can use traditional bone-type wipers or three-section wipers to resolve the issue. Also, different-sized wiper blades require varying levels of pressure from the wiper arm. Let me give you an example: Suppose the wiper blade is designed to exert a pressure of 0.5 kg, but the rocker arm itself weighs only about 0.4 kg. In this case, the middle section won’t press firmly enough against the windshield, resulting in poor wiping performance. To solve this, I recommend reducing the wiper blade size by one size—it should help eliminate the problem.

　　In addition, when using car wiper blades, you may encounter other issues—such as vibrations during operation. This phenomenon typically occurs because the windshield isn't clean or because the wiper blades are frequently operated under abnormal conditions. As a result, dirt and debris can accumulate on the rubber blade. If this happens, we recommend gently wiping the blade with a damp tissue or smoothing out the blade edges with sandpaper. If you notice any damage to the wiper blades or improper installation of the wiper arm, or if the pressure exerted by the wiper arm is too light, the wiper blade won't make tight contact with the glass. Combined with wind resistance during driving, this can also cause vibrations. Another common issue is the occurrence of unusual noises during operation. This is because the blade design of wiper blades differs between those with straight blades and those with bone-type frames. Moreover, 90% of car wiper blades are designed with a multi-layer structure—typically two or more layers of rubber arranged horizontally—when they're manufactured. Therefore, after the new blades have fully drained the rainwater, the lower layers of the blade may start dry-scraping against the glass. Under these circumstances, noise is naturally produced. If you encounter this situation, there's no need to worry excessively. With continued use over time, the noise will gradually subside and eventually disappear altogether.