In order to ensure the accuracy of the thermometer for a longer period of
time you should calibrate it once a year.
Clean the device and the window of the display with a clean, lint-free,
anti-static and dry cleaning cloth.
P.23
12. MAINTENANCE
Do not use cleaning agents that contain carbon or
benzenes, alcohol or anything similar to clean the
product since these substances damage the surface
of the measuring instrument. Moreover, these fumes
are hazardous to health and explosive. Do not use
tools with sharp edges, screwdrivers, metal brushes
or anything similar to clean the device.