TechniSat DIGITRADIO 10 IR Manual page 152

Clean the housing using a soft, damp cloth. Do not use spirit, thinners, etc.;
you could damage the surface of the device.
Only clean the display with a soft, cotton cloth. If required, use a cotton cloth
with small amounts of non-alkaline, diluted, water or alcohol-based soap
solution.
Gently clean the surface using the cotton cloth.
152