After washing, check the cleanliness of the car. If necessary, brush the treads, wheel seats, lower edges of the thresholds with brushes. Sometimes it is useful to wipe the door frames and grooves with a sponge or rag. In winter, when salt-containing products that treat roads get on the car and are deposited on the fenders and bottom, you should stop by the car wash more often. This way, rust will be less likely to damage your car.