What are the reasons for unclean car window wiping?

[IvanRose]

Reasons and solutions for unclean car window wiping: 1. The glass is too dirty. This is due to excessive dust. Spray more windshield washer fluid and wipe several times to clean it thoroughly. Always use washer fluid when wiping. 2. There is oil on the glass. If the car is parked in a place with oil fumes or if insects have collided with the glass, oil residue may be present. Oil is generally not easy to remove and usually requires car wash soap or foam cleaner to clean. 3. The wiper blade has oil. Many people forget that the wiper blade can also accumulate oil. After cleaning the glass, it is necessary to clean the wiper blade as well. This will make the cleaning more effective. The cleaning method is the same as above. 4. The wiper blade is damaged. This does not only refer to physical damage. Sometimes the wiper blade may be deformed, not adhering tightly to the glass, or not fitting closely during wiping. In such cases, it is best to replace it with high-quality parts. 5. The wiper motor is damaged. Besides being burnt out, the motor may have excessive gaps, causing the wiper blade not to adhere tightly to the glass. This can be detected through careful observation. 6. Not using windshield washer fluid. It is necessary to use washer fluid as it provides much better cleaning effects. Many people use water or water mixed with a little washer fluid. However, water is not very clean and does not effectively clean the glass.

[DeLeila]

I think the issue of car glass not being wiped clean is usually directly related to the aging of wiper blades. After several years of use, the rubber material hardens and deforms, leaving water streaks or marks when wiping, resulting in blurred vision. This is quite common in my daily driving, especially since high temperatures accelerate the aging process. Another reason is the presence of an oily film on the glass surface. Air pollutants and exhaust fumes from vehicles ahead can form a greasy film on the glass, which ordinary wipers can't remove. You need to use an oil film remover or white vinegar to scrub it off. Additionally, deformation of the wiper arm can cause uneven pressure on the blade, leading to skipping or gaps during wiping, which affects cleaning effectiveness. For a simple check, lift the wiper blade to see if it's cracked or whitened. Replacing it with a new one can often solve the problem. I recommend checking the wipers every six months to ensure safe driving in rainy weather. Don’t wait until there's a problem to act. Increasing the frequency of glass cleaning can also help prevent such annoyances.

[EvelynFitz]

Most cases of unclean windshield wiper performance are due to worn wiper blades or a dirty windshield. Over time, rubber blades harden and deform, leaving water streaks when wiping. I often replace them myself with new blades—they're affordable and deliver immediate results. Another common issue is oil buildup, especially for city drivers, forming a greasy film on the glass. Use professional cleaners like glass polish for thorough cleaning, avoiding household detergents to prevent scratches. Occasionally, poor-quality wiper fluid can also cause problems, so opt for a good diluted solution. Address unclean wiping promptly—delaying can be dangerous in rainy conditions with poor visibility. During routine cleaning, take a moment to wipe the glass surface; this extends wiper lifespan and ensures clear, comfortable driving.

[HarperFitz]

The main reasons are worn wiper blades or dirty glass. When the rubber of the wiper blade ages and deforms, it fails to wipe cleanly, and dirty or oily glass surfaces can cause uneven wiping. Additionally, damaged wiper arms with insufficient pressure may also lead to incomplete wiping in certain areas. Regularly cleaning the glass with a neutral detergent can prevent the problem from worsening. If issues arise, replace the blades promptly to ensure clear visibility and safe driving.