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A robot that washes windows? A Winbot, of course - This window-washing robot will clean one side of a normal-sized window in about 20 minutes, and never leave a streak or bug-spot behind. Its vacuum-powered suction cup keeps it from falling off the glass as it makes its way around. For those high-up windows, just give it a longer extension cord. The award-winning device sells for about $400 and will make your all your windows sparkle inside and out, without you lifting a finger.