1. Clean the glass first and dry it, and there can be no sand and dust residue on the surface.
2. Then fully shake the car glass cleaner and drop a proper amount on the sponge gray surface.
3. Then draw a small circle on the glass surface with a sponge, so wipe it hard and evenly.
4. After wiping, rinse and wipe the glass with water and towel.
I hope some suggestions are helpful to you and you can adopt them.