Softens water to enhance performance. Effective in all brands of dishwashers with softener components. Helps protect your dishwasher from limescale. Reduces spots and watermarks on your dishes and glasses. 99.9% pure and specially granulated for use in dishwashers with a water softening unit. Directions for use, pour the salt in the salt dispenser if indicated by the dishwasher and close. For best results check the salt level frequently and refill with Soft Spring Dishwasher Salt to ensure optimal results in a hard water area. Run dishwasher. Optimal incoming water temperature is 120 degrees Fahrenheit.