A composition is provided comprising three liquids which are separately maintained prior to forming an admixture during delivery to a surface to be treated, whereupon the admixture generates a heated foam sufficient for cleaning efficacy and stability. The coupling includes a base, a pair of pins, a jacket and a biasing means. The robot chassis carries a supply of cleaning fluid and a waste container for storing waste materials collected up from the cleaning surface. The window scroll-bar also contains a slider, which moves within a section and between sections.