For pets kids and everyday disasters it s Biokleen Bac-Out to the rescue. Our unique blend of plant-powered substances uses live enzyme cultures to remove the toughest stains and odors. Bac-Out works wonders on clothes laundry pet stains furniture carpet and more. How does it work? Bac-Out contains live enzyme cultures that break down stains and odors into tiny particles. The smaller the particles the easier it is for Bac-Out’s good bacteria to eat the soiled area. Bacteria then digest the stain and odor particles into carbon dioxide and the bacteria continues to multiply and eat as long as soil — its food source — is present. This type of enzymatic cleaning allows for longer and continued cleaning of the stain and odor. 128 oz.