Want to save sone money on cartridge refills? You can buy this device to hack your device. Cat genie sells their device at next to cost, they make their money up charging
Catgenie : How to Use Refilled 120 SaniSolution Cartridge : 4 Steps - Instructables
Cat Genie 120 Hack - YouTube
Catgenie : How to Use Refilled 120 SaniSolution Cartridge : 4 Steps - Instructables