How to solve the dirty things after the car wiper

When the car wiper wipes the rain water, the problem of still having dirt often occurs. There are mainly the following three reasons. One is that the car is parked in a place where the cooling water tower of the central air conditioner is downwind. When the cooling water tower drops particles on the glass, small white spots will be formed. . The second is to park the car under the tree, and the secretion from the insect sticks to the glass. The third is the mucus produced by insect corpses. Since these things stick to the glass and it is difficult to remove them, a lot of uneven surfaces will be formed on the glass. Therefore, when the wiper is used, the glass will not be cleaned.

       So how should we solve it? We can wet the glass with water and touch it back and forth with our hands. If there is any unevenness, it means there is a foreign body. This can be wiped with warm water or newspaper. These two effects will be good. After wiping, rinse with water. That's it.