What is the reason why the windows on both sides cannot wipe off rainwater when raised or lowered?
2 Answers
The situation where the windows on both sides cannot wipe off rainwater when raised or lowered is likely due to aging window rubber seals or improper glass installation. Here are several reasons why wipers may not clean effectively: 1. Excessive force from the wiper arm: The solution is to check the wiper arm spring. 2. Insufficient curvature of the wiper: The solution is to replace the wiper with poor curvature and purchase a wiper with better curvature. 3. Bird droppings or other particles on the car's glass causing stains to spread when wiped: The solution is to clean the glass with a cloth before driving and also wipe the wiper rubber strips clean. 4. Cracks in the wiper rubber strips.
I've encountered this issue too. As a veteran driver with over a decade of experience, I believe the main cause is aging window seals. Over time, they harden or deform, losing their tight fit against the glass, making it impossible to wipe off rainwater when rolling the windows up or down. If there's oil or dust on the glass itself, it tends to attract water, rendering the window movement ineffective. Especially after rain, dirt accumulates faster, further compromising the seal. I recommend regularly cleaning the edges of the window seals with warm water and a bit of dish soap, then drying them with a soft cloth to restore some elasticity. If cleaning doesn't help, the seals might have reached the end of their lifespan and need replacing—doing it yourself costs just a few dozen yuan. Also, check for any debris stuck in the window tracks and clean them out if necessary. Paying extra attention to both the inside and outside of the windows during regular car washes can prevent this issue. After all, poorly functioning windows can obstruct your view while driving, which is quite unsafe.
