Why does the car's mirror get wet when it rains?

First, because the direction of raindrops is not always the same, and the splashing of raindrops, it is difficult to keep the mirror completely free from water. You can try sticking a rain eyebrow on your rearview mirror, which can play a certain role, or spraying waterproof agent on the rearview mirror, which can also have a certain effect.

Second, the treatment method:

Using coated detergent has the advantages of convenience, saving money and good effect.

Applying detergent, soapy water, shampoo and a layer of car wax to the rearview mirror can temporarily solve the problem of fogging in the rearview mirror. When driving in rainy days, he painted a layer of detergent on the rearview mirror, and the effect was good, especially when it rained heavily, which kept the mirror clear within 1-2 hours. Other friends have tried soapy water, shampoo and waxing the rearview mirror, which can last longer.