Maintenance And Cleaning - Conrad Electronic FS20 S4 Operating Instructions Manual

14. Maintenance and cleaning

The product requires no servicing except for battery replacement. Repairs
or maintenance work should only be carried out by a skilled technician.
Clean the product with a soft, clean, dry and lint-free cloth.
To remove heavier dirt, use a cloth which is slightly moistened with
lukewarm water. Do not use solvent-based cleaning agents, as these may
damage the surface of the plastic casing and its inscription.
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