What Causes the Car Wiper to Not Turn Off?

[LeOlivia]

If the car wiper cannot be turned off, it is likely that the automatic mode is activated, and there is water falling on the windshield, causing the wiper to keep working. If the automatic mode is not activated and the wiper still cannot be turned off, then there is an issue with the wiper switch, and the wiper switch assembly needs to be replaced in such cases. The rubber of the wiper can adhere closely to the windshield, allowing it to remove dirt and water from the windshield during its back-and-forth motion. However, rubber products can age over prolonged use. Aged rubber tends to harden, and hardened rubber cannot maintain close contact with the windshield, leading to ineffective wiping and even causing unusual noises during the wiping process. Wipers need to be replaced periodically, but there is no strict usage period for wipers. They should be replaced as soon as issues like ineffective wiping or unusual noises occur.