The system is basically maintenance-free. The sensor surface of the finger scanner is practically self-cleaning due to its repeated use (pulling fingers). If the finger scanner still gets dirty, clean it with a damp (not wet), non-scratching cloth. Suitable are cotton swabs, microfibre and spectacle cloths. Not suitable are all cotton-containing fabrics, paper towels and paper handkerchiefs, kitchen sponges, moistened dishtowels and kitchen rolls. Use pure water without detergent additives. Proceed carefully in the sensor area.
If disinfection of the entire finger scanner including the sensor is necessary, you can use aqueous and alcohol-based agents. However, these should be able to dry quickly in the sensor area. The lacquer of the finger scanner is very resistant to all common cleaning and disinfecting agents with an exposure time of less than 10 minutes.