Scott Brand Citrus Scented Continuous Air Freshener Refills are the best and most economical way to keep your restrooms smelling clean and fresh. There are no batteries to replace in these units as they are completely self-powered. Kimberly Clark air fresheners  provide continuous air freshening in your restrooms 24 hours a day 7 days a week non stop. Scott Brand is changing the way foodservice establishments clean their air. Each citrus cartridge restroom air freshener last for 60 days.