The professional standard that ensures the quality of the cleaning and disinfection of flexible endoscopes (the SFERD handbook) is well known in hospitals and independent clinics. However, not all measures are effectuated and also the level of conformance varies. A study by the RIVM shows that a lot can be improved in the implementation of the requirements of the professional standard. Through verification of the system specifications, the healthcare facility shall demonstrate that the endoscope washer disinfector and the endoscope drying cabinet still perform as intended by the manufacturer of the equipment. The annual verification is less than optimal because the equipment manufacturers do not provide all the system specifications. Therefore, it is difficult to determine whether the equipment is functioning properly. Attention is needed for the frequency of the testing and inspections and the technical details of performance of these. Healthcare facilities deviate from the materials and procedures that are prescribed in the SFERD-handbook. This may lead test results and wrong conclusions about the quality of the cleaning and disinfection of flexible endoscopes.