ACTIVE Dishwasher Cleaner Tablets clean and descale your dish washer to keep it smelling fresh and operating smoothly. Remove odors and limescale mineral deposits from inside the machine. Safe for all types of dishwashers, refresh and restore shine by getting rid of hard water spots. Pleasant lemon scent is the only thing left behind inside your squeaky clean dishwashing appliance. Penetrate grime buildup and leftover food residue which gunks up the inside of the dishwasher. Helps keep internal moving parts clean and maintains proper performance. Natural ingredients are safe for homes with septic systems. Twice per month simply add 1 tablet to the dish detergent dispenser then run the dishwasher empty on a normal wash cycle. After the cycle is complete, open the door to let the machine air-dry. Each pack includes 24 tablets for a full 1 year supply.