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.