Part of the problem with some stains is the odor that accompanies them. Pet stains and people stains can be the worst offenders, leaving an odor long after the visible stain is gone. Bi-O-Kleen's Bac-Out Stain and Odor Eliminator uses natural enzymes to break down stains and odors in the laundry room and beyond. This formula is designed to help remove stains from clothing and carpet. It's great on clogged and smelly drains and disposals. Use it in trash cans and diaper pails. It also works wonders in the smelliest of rooms...the bathroom.