*Highly Effective: Cuts right through hard water residue / limescale in your dishwasher *Softens the water used in the dishwasher for a more thorough cleaning *Free of Additives: No caking compounds, iodine or any other additives! *Easy To Use: Simply add salt to the dishwasher salt compartment and close. *Check the level and refill as necessary. Consult your dishwasher manual for exact, model-specific directions