The effective cleaning system for removing the microbial coat (Biofilm) in dental treatment units Examinations of the colonisation in dental treatment units resulted in the discovery of a dense, slime-like coat (Biofilm) on the interior sides of the water carrying plastic tubes, on which grow micro-organisms. Under such circumstances micro-organism can persist for a long time and also resist extreme environmental conditions. By means of an intensive decontamination with H²O² (Hydrogen Peroxide) the number of colonies can be decreased on the next day, but on the following day it will increase again very quickly. The reason for this problem is that H²O² does not have any cleaning qualities and as a consequence the culture medium for the bacteria (Biofilm) is not removed. The primary objective is to remove the culture medium (with the BRS system) and to prevent a new formation of this culture medium with a suitable decontaminating liquid (Alpron) to be given continuously into the dental system. Advantages of the BRS (Biofilm Removing Set): 1. The Biofilm Remover itself is very alkaline in the solution for use (pH 11). 2. The Biofilm Remover is extremely ecological and very compatible with materials (soda composition basis). 3. The Biofilm Remover has a good cleaning capacity against organic residues (Biofilm). 4. The Neutraliser in the BRS reduces the pH value to a neutral value. 5. Due to the pH shock the culture medias are dissolved and rinsed away. 6. Only a 1% solution of Alpron needs to be used to maintain the disinfection level (see advantages of Alpron).