There are good bacteria and there are bad bacteria. The bad ones can cause sickness and disease while the good ones are instrumental in things like fermenting beer, curing tobacco and processing cheese. Odour Eater contains only good bacteria , in this case they are special bacteria designed to remove stubborn odours and stains using natural bio-enzymatic reactions. When the bacteria in Odour Eater come into contact with organic matter, they act like sponges to absorb it. The enzymes produced by the bacteria liquefy and then literally digest the matter as their food. No by-products are produced by this process except harmless carbon dioxide and water. The bacteria in Odour Eater are living organisms and need food to grow and multiply. Once they contact organic matter, they go to work digesting otherwise impossible to remove odors and stains. Odour Eater eliminates odors and stains more effectively because every litre is certified to contain at least 50 Billion bacteria.