Instructions: 1. Pour 4 to 5 inches of litter into an empty, dry tray.2. Remove solid waste daily with a perforated litter scoop, do not flush down a toilet. Be sure to wash your hands thoroughly after each use. Add some litter if the level gets too low.3. After 40 days, empty the entire litter box into a garbage bag and clean the tray with mild soap. Allow to dry completely before refilling the litter box.