Our unique, professional Sörbo Window Cleaning Soap is a fast acting glass cleaning soap that doesn’t leave a residue on the window. Unlike most soaps which have “hand protection” formula oils that attract pollution to the surface, it gets windows TOTALLY clean and keeps glass clean longer. This non sudsy soap can be used with cold or warm water. Complete Container: 12 oz.(340g) of powder in a bottle. Instructions for use: Fill the bucket half full with water. 1 tbsp makes 2 gallons. Dip one end of the washer and soak the rest with the sponge up to the handle. Squeeze the water out of the washer and repeat the procedure for the other end. Always place the washer horizontally on top of the bucket when not in use. Sörbo developed the window cleaning soap in 1987.