Sony ERA-201D1 - Manual (Page 26)

26
Moisture condensation
If the LAN card is brought directly from a cold place to a warm place,
moisture may condense inside or on outside surface of the card, causing
damage. If moisture condensation has occurred, wait for a few hours before
using the LAN card.
Cleaning
Clean the casing with a soft cloth, lightly moistened with water or a mild
detergent solution. Do not use any type of abrasive pad, scouring powder or
solvent such as alcohol or benzine as it may damage the finish of the casing.