5.4 MMS tip no. 4 Biofilms in the bathroom, WC and kitchen

We have the idea that bacteria swim around individually and multiply. In fact, bacteria often live in colonies and form a protective slime layer (biofilm) around their colony. This makes the bacteria resistant and protected against extremely adverse boundary conditions, such as the pH value of the environment. This biofilm also protects them on the outside from other threats such as many biocides or antibiotics and provides the best living conditions for the growth of bacteria on the inside. In kitchens and bathrooms, these biofilms can be seen, for example, as reddish or black streaks on or in the tile joints. These biofilms also form in water tanks, water filters, pipes, the drainer in the refrigerator or, for example, on the always moist kitchen sponge. Chlorine dioxide has a very special property compared to many other biocides:

Chlorine dioxide can penetrate biofilms very quickly and dissolve them completely.

The bacteria are then defenceless against the chlorine dioxide and are thoroughly killed. This effect is used in breweries and milk processing plants, for example. There, pipes and containers are regularly rinsed with chlorine dioxide and thus disinfected.

Analogously, pathogenic germs in the bodies of humans and animals also form biofilms to protect their colonies. Perhaps this property of chlorine dioxide, in addition to its strong oxidizing power, is an explanation for its rapid and thorough disinfecting effect in the body. With antibiotics, you would have to use higher and higher doses to get through this biofilm and then struggle with the adaptability of the bacteria to develop resistance through mutation. Fortunately, chlorine dioxide does not have these problems.


Simply prepare a MMS/CDS spray bottle according to MMS tip no.3 and spray the biofilm several times every 10 minutes and let it work until it can be rinsed off without further ado.

Scroll to Top