If the glass is very dirty, the Robot needs to clean multiple times. Best is: 1) run dry (no water spraying). 2) run using distilled water only. 3) Run using half window cleaner / half distilled water. Each time, use clean pads. The Create Wipebot Pro is really only a beginners model. I have owned one for a year, not I bought the Hobot S7 pro...
The window cleaner can also clean horizontal glass surfaces, such as the top and bottom of a conservatory roof, as it works in hard-to-reach places thanks to its powerful suction and adhesion system. It is versatile and can be used for windows, mirrors, shower cubicles, tiles and other smooth surfaces.
The Wipebot Pro does not remain plugged in during use, but is equipped with a rechargeable battery. The battery lasts approximately 30 minutes, enough to clean several windows without the need to be connected to the mains.