What Causes the Car's Front Windshield Wiper to Not Clean Properly?

[DiElena]

Rain wipers not cleaning properly is mainly due to invisible dirt on the glass. Here is some information about wipers: 1. Function of wipers: Wipers are important accessories installed on the windshield, designed to remove rain, snow, and dust that obstruct the view on the windshield. Thus, they play a crucial role in driving safety. 2. Types of wipers: Wipers generally include vacuum wipers, electric wipers, and wipers with electronic control units. The drawback of vacuum wipers is the unstable speed of the wiper blade. When the engine's vacuum decreases (for example, when the car is climbing a slope), the wiper blade may stop, blurring the driver's vision. Vacuum wipers were phased out in 1972 and replaced by electric wipers.

[SanMaggie]

Last time I drove back to my hometown, I encountered this exact issue - the wipers were swiping but the windshield remained foggy. After struggling for a while, I found three key points worth noting: First, the wiper rubber had aged and hardened due to lack of maintenance, with the edges worn into jagged shapes. Second, there was an oily film buildup on the windshield, especially difficult to clean after highway driving with insect remains and exhaust fumes. Third, the wiper arm spring had loosened, lacking sufficient downward pressure, causing the blade to hover without proper glass contact. I recommend changing wiper blades every six months and using specialized glass degreasers during car washes. Driving at night without these precautions can be dangerous - during a heavy rainstorm once, I almost couldn't see the road and nearly hit a guardrail.

[SanJayla]

As a frequent road-tripper, I have a lot to say about windshield wipers not cleaning properly. Key things to check: whether the rubber strips are cracked, and if the blade edges feel rough to the touch. For those who park under trees, regularly clean off tree sap—once that sticky stuff dries, ordinary wipers can't handle it. Also, when installing new wipers, remember to peel off the protective film on the rubber strips. I once foolishly installed them only to realize later that the transparent film was still on. The most surprising discovery? Running the AC to blow on the windshield causes condensation on the outside, making the wipers smear instead of clean. Now, I always turn off the AC before wiping the glass.

[DiJeremiah]

If the windshield isn't being cleaned properly, first check the condition of the wiper blades. When the rubber ages and cracks, its elasticity deteriorates, reducing contact with the glass and naturally leading to poor cleaning. Oil buildup on the glass surface forms a hydrophobic layer, making it harder to remove water beads. Additionally, insufficient pressure from the wiper arm or incorrect angle can cause the ends to lift. For mild oil film, I often use toothpaste, but severe cases may require clay bar polishing. When parking, avoid areas under pine trees or where birds gather, as resin and bird droppings are particularly damaging to wiper blades. Regularly replacing the rubber strips is far more important than you might think.

[Torres]

This issue is likely caused by three main factors: First, the wiper blades lose their elasticity after wear and tear. My car's blades hardened by the second year. Second, there might be water stains or insect residue on the windshield, especially after long-distance drives. Third, using the wrong windshield washer fluid formula can be problematic, as low-quality fluids often leave streaks. Now, I always clean the glass during car washes, and using newspaper with dish soap works wonders for removing oil films. If the wipers start skipping, it's time to replace them immediately—don't wait until the blades crack and scratch the windshield, as replacing the windshield can be painfully expensive.

[AllieFitz]

I've been driving for twenty years and encountered all kinds of situations where the wipers couldn't clean properly. Rubber blade oxidation and hardening is the most common issue - after just two months of summer sun exposure, small cracks start to appear. Cheap windshield washer fluid leaves white residue after evaporation and can clog the nozzles. Another problem is rusted wiper arm springs causing insufficient pressure, which can be temporarily fixed by adjusting the angle with a screwdriver. A key lesson is to avoid parking under air conditioner drips - those mineral-rich water stains are hard to remove. Tree sap can be cleaned with alcohol wipes. When replacing wipers, don't cheap out on no-name brands - OEM parts may cost more but last at least six months longer.