1. The sponge is mainly for water absorption, which can fully lubricate the paint surface when washing the car;
2. When washing the car, you should first wet the surface of the car with a water gun, and then use a sponge to dip in the clean water mixed with car wash liquid to smear the surface of the car. If you encounter stubborn dirt, you can use the sponge to wipe repeatedly;
3. After the surface of the vehicle is smeared, rinse off the foam with a water gun and dry it with a clean towel.