A drop of Sörbo Glide makes the squeegee slide before the window dries! Sörbo Glide lubricant liquid provides a complete sheet of water on the window which prevents the water from drying up in spots. It reduces friction and slows down evaporation which is ideal in warm, dry climates. It also keeps the washer sleeve cleaner by helping to rinse the dirt out because it prevents dirt from sticking to the washer sleeve material. May be mixed with Item #2104 window cleaning powder to fine-tune and balance cleaning power, friction and evaporation rate.