The reason why the wiper wipes the glass is jumping

Is the wiper scraping the glass jumping? The wiper scratches the glass, and the common reasons are as follows: 1. The front windshield of the car is not clean enough, and there are foreign objects. 2. There is a problem with the wiper strip. 3. There is a problem with the wiper spring.
The front windshield of the car is not clean enough and there are foreign objects. The reason is probably that there is grease on the front windshield or a rain-proof product has been applied.

Solution: Clean up the foreign objects.
If there is a problem with the wiper strip, it may be that the wiper strip is aging or the wiper strip has reached the limit of its life. Under normal circumstances, wiper strips should be replaced every one to two years. Moreover, the wiper is a rubber product, which is prone to aging and hardening over time.

Solution: Replace the wiper strip.

If the glass is cleaned and the wiper strip is replaced, but there is still a jumping phenomenon when scraping the glass, it is likely that the angle of the wiper swing arm is wrong, causing the angle of the wiper blade and the windshield to change when they are in contact.
The simple understanding is: the wiper blade is not as vertical as possible to the glass. You can try the following solutions:
Use pliers to clamp the front end of the wiper arm (the hook that hooks the wiper) and twist it. The wiper is twisted counterclockwise when it scrapes upwards, and it twists clockwise when the wiper scrapes back. Keep the wiper strip perpendicular to the glass until it doesn't jump.