If you use the Cat Genie Cat Box (sold separately) for a maintenance-free, odor-free, and germ-free cat environment, you'll need to replace its Sani-Solution Smart Cartridge after each 60 washings. This cartridge dispenses the exact amount of sanitizing solution needed to decontaminate Granules and Genie Bowl and to keep the CatGenie running properly. Made with same ingredients used by veterinarians to sterilize their exam and operating areas, the Sani-Soultion Smart Cartidge will even alert you when the solution runs low.
