Window cleaners use towels to wipe around the windows, remove sludge from the bottom, spray gasoline and apply cleaner, and finally use hot water to wipe away the window stains.
1. The cleaner uses a towel to wipe around the windows.
2. Use a shovel to remove the mud at the bottom of the window.
3. Spray gasoline on the blue paint.
4. Then apply the cleaner on the yellow paint.
5. Wet the towel with hot water from the kettle and wipe the stains on the window.