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CES 2014: Robot window cleaner gets to work

8 January 2014 Last updated at 11:15 GMT

US company Ecovacs Winbot has demonstrated a $350 (£213) window cleaning device at CES 2014 in Las Vegas.

The Winbot sticks on to a window and uses sensors to work out where it needs to go to keep the pane clean.

Sara Rosenthal of Ecovacs showed the BBC how it works.