What are the reasons for the wiper not cleaning properly?

[McAva]

The reasons for the wiper not cleaning properly are: 1. Oil film on the glass; 2. Skipping occurs; 3. The wiper blade is aged or hardened; 4. Foreign objects are stuck between the wiper and the windshield; 5. The wiper arm angle is asymmetrical. The solutions for the wiper not cleaning properly are: 1. Clean the oily windshield with toothpaste; 2. Adjust the wiper arm with pliers; 3. Replace the wiper blade; 4. Remove foreign objects stuck between the wiper and the windshield; 5. Adjust the angle of the wiper arm. The steps for removing the wiper are: 1. Lift the wiper arm from the windshield; 2. Press the release lock pin and move the wiper along the wiper arm; 3. Remove the wiper for replacement.

[VivienneMarie]

After driving for a long time, I noticed that the wipers weren't cleaning properly, and the first thing that came to mind was the aging of the rubber blades. The rubber material of the wiper blades can harden and crack due to exposure to sunlight, extreme cold, or prolonged use, losing their fit against the glass. Especially during the high temperatures of summer, the windshield can reach 60-70 degrees Celsius, accelerating the aging of the rubber blades. Another hidden culprit is the oil film on the windshield, particularly for vehicles that frequently drive on highways. Exhaust fumes from preceding vehicles can adhere to the glass, forming an oil film that turns into a hazy mess when it rains. I personally use an oil film remover regularly and check if the wiper arms are deformed. Additionally, improper installation of the wipers can also affect performance; loose clips or incorrect models can cause deviations in the wiping angle. I recommend replacing the wiper blades before the rainy season starts, rather than waiting until they're completely worn out.

[LePiper]

As an auto mechanic, I've seen too many cases where wipers don't clean properly. There are three common causes: rubber blade aging and hardening leading to water streaks; stubborn oil film formed by grease or tree sap on the windshield; and structural issues in the wiper system including failed wiper arm springs, deformed linkage, or loose mounting base. Once a car owner complained about persistent poor wiping, and upon inspection, I found it was caused by rusted and deformed wiper arms creating uneven pressure. Also, low-quality wiper blades might perform poorly right after installation, as inferior rubber material easily deforms. I recommend checking wiper brackets every six months. For cleaning the windshield, kitchen cleaner works well for removing oil film, but avoid applying it to the rubber blades.

[OAlexis]

I believe the cleanliness of wiper blades is directly related to daily maintenance. Every time I wash my car, I wipe the rubber blades with a damp cloth to prevent grit from getting stuck in the rubber grooves and scratching the glass. The issue of glass oil film is particularly easy to overlook, especially in cities with severe air pollution—when wipers smear more than they clear, oil film is usually the culprit. I use a glass oil film remover and find treating it every two months very effective. In summer, try to park in shaded areas to avoid high temperatures, as UV rays can rapidly age the rubber. In northern winters, remember to clear snow from the wipers before starting them; scraping in frozen conditions can tear the edges of the rubber. Wiper blades typically last about a year, and I make it a habit to replace them before the rainy season begins.

[JamesonFitz]

Through my research on automotive parts, I've found that ineffective windshield wiper performance is often due to multiple factors. First is the condition of the rubber blade - premium quality wiper blades can conform perfectly to the windshield curvature, but exposure to high temperatures or chemical corrosion can cause hardening and cracking. Second is windshield cleanliness, as oil films, bug residues, and mineral water stains all affect performance. I've also observed that microscopic pits on the glass surface can cause streak marks, especially on vehicles frequently driven on gravel roads. The frameless wiper design outperforms traditional framed types with more even pressure distribution. During installation, ensure the mounting clips are fully secured to prevent skipping during operation. Vehicles with highly curved windshields require specially designed wiper models, as standard wipers may leave the edges uncovered. When selecting wipers, don't just opt for the cheapest option - the quality of the rubber blade directly impacts visibility and driving safety.

[LaLaila]

With over 30 years of driving experience, I've concluded that wiper issues mainly stem from the rubber blades and installation. Rubber components have limited lifespan—prolonged sun exposure causes blade deformation and ridges, leaving water streaks. Dust accumulation in wiper slots creating loose installation is another hidden danger; I clean these slots monthly. The worst scenario is frozen wipers in winter—forcing them to operate may damage the motor gears. When cleaning becomes ineffective, I first check for windshield grease (easily handled with dish soap). If the rubber feels hardened to touch, replace it immediately—never compromise. Before rainy seasons, I take my car to workshops for wiper arm angle adjustments, ensuring full blade-to-glass curvature contact.