Arm & Hammer Double Duty Clumping Litter breakthrough formula destroys urine and feces odors instantly and helps keep your home smelling fresh and clean. Powerful moisture-activated baking soda crystals boosted with feces odor neutralizers destroy odors on contact. Rock-solid clumps let you remove the source of odors easily. Instructions for Use: 1. Fill a clean, empty litter box with 3-4 inches of cat litter. 2. Litter forms rock-solid clumps on contact with urine and eliminates odors. Remove clumps and solid waste daily to keep the rest of litter fresh. 3. Add more cat litter to replace what you scooped out and maintain a depth of 3-4 inches. Once a month, empty the entire litter box. 4. Dispose of used litter in trash. Do not flush or put in drains. Note: Please wash hands thoroughly after handling used cat litter. The manufacturer wants to remind pregnant women and those with suppressed immune systems that a parasite sometimes found in cat feces can cause toxoplasmosis.