Rinse aid features a two-part solution to strengthen and protect the surface of your glasses while shielding them from permanent clouding or etching. Advanced drying power helps prevent spots and streaks from forming to leave your glasses as sparkling as the day you bought them. Its easy-to-use design activates automatically during the rinse cycle, so simply refill the compartment monthly or as needed for clean dishes. Versatile ingredients work together with Cascade dishwashing detergent (sold separately) to add shine and shield dishes from future damage.