Rinse Aid reduces the surface tension of the water inside your dishwasher. This makes water less likely to cohere in drops on your dishes- meaning virtually no spots on your dish ware! Rinse aid also makes your dishes finish drying faster, which allows the dishwasher to use less power each cycle, making every load of dishes you run with Rinse Aid more sustainable!No toxic residue left behind on clean dishes- unlike the leading finishing agent brands.