Instructions: For best results, do not mix with non clumping cat litter. For first time use, start with an empty, clean cat litter box. Fill it with 3 to 4 inches of Fresh Step Cat Litter. Remove clumps and solids daily and dispose in trash. Do not flush. The rest of the litter stays fresh. Add more Fresh Step Cat Litter to refresh your litter box each time you scoop. Maintain level of litter at 3 to 4 inches.