Why doesn't the wiper clean properly?

[MaryRose]

It may be caused by dirt on the glass, or aging and fraying of the wiper rubber strip. More related information is as follows: 1. Precautions for wiper maintenance: If the glass is not regularly cleaned, there may be many attachments and dirt on the windshield, which reduces its smoothness and makes it difficult to clean. In severe cases, it may even damage the wiper. When washing the car, be sure to clean the stains on the glass thoroughly before testing the wiper. The rubber strip of the original factory wiper has a relatively long lifespan, up to about 5 years. It is important to regularly clean the fine sand particles on the wiper rubber strip, as they can cause significant damage. It is best to use a clean towel to remove tiny sand particles from the wiper rubber strip each time you wash the car. Additionally, avoid parking in direct sunlight during summer, as rubber products are most vulnerable to UV rays, which can cause them to harden and age. 2. Adjustment method: If it's just an angle issue, simple adjustment is sufficient. Adjustment method: Use an adjustment wrench to clamp the wiper and gently rotate it to adjust it to a vertical position.