Windows Cleaner / clean robot

Use theory of a snail Climbing a wall, creating a future machine to clean windows.

Instructions:
1.Add some water and cleanser.
2.Start the Cleaner; set a range of the window and a route of the Cleaner.
3.Put the Cleaner on the window.
4.The Cleaner will clean the window by the route you set.
5.When it is sunny, the solar energy board will absorb the energy of light, and the
Cleaner will change the light to electrical energy.
When it is rainy, the absorbent holes will absorb the rain, and the rain wlil be filtered and kept as the clean water.