Review on Arm & Hammer for Pets Cat Litter Deodorizer: 20oz (Pack of 4) with Activated Baking Soda - Ultimate Odor Control for Your Feline Friends by Lena Marckese

Instructions are simple and work great!*Two cats, 12 and 17 years old*Two trays on 1st floor and 2 trays on 3rd floor*Boxes scooped out once a day*Extra litter boxes will be added every 3-4 days (or as needed) * Litter boxes are completely emptied of old litter and replaced with new litter every 6 weeks * Use Arm & Hammer Clump & Seal Platinum litter When I change old litter, I spray deodorant on the floor beforehand Adding new beds. Then I sprinkle it LIGHTLY on top about once a week and mix it up with a spoon. I am very sensitive to strong smells and still breathe through my mouth. It only takes a few seconds and is definitely better than a smelly tray!