Abstract: A cleaning device to be used on vertical surfaces such as windows that includes a horizontal row or number of horizontal rows of pressure washing nozzles. The nozzles are to be aimed at the surface to be cleaned and so protrude orthogonally from a horizontal pipe. The pipe is to be supported with a structure such as tubing or truss and winched or otherwise pulled up and down the surface of the building. A stability system can be provided to tension the guide cables that guide the cleaning device while constraining excessive horizontal movement of the stability system.