The ‘ekey uno’ is basically maintenance-free.

Clean the sensor surface of the fingerprint scanner and the fingerprint scanner itself with a damp (not wet) non-abrasive cloth. Q-tips, microfiber cloths, and glasses-cleaning cloths are suitable for this purpose. Materials containing cotton, paper towels, tissues, kitchen sponges, damp dish towels, and kitchen roll are not suitable. Use clean water without adding detergent. Treat the sensor surface with care.

In case it is necessary to disinfect the entire fingerprint scanner including the sensor, you can use aqueous, alcohol-based cleaning agents. However, these should be able to dry quickly in the sensor area. The paint on the fingerprint scanner is very resistant to conventional cleaning and disinfection agents which are left to sit for less than 10 minutes.