Sony Walkman NWZ-W273S Help Manual page 22

Wash the earbuds by hand using a mild detergent solution.
After washing the earbuds, dry them well.
2. Wash your Walkman.
Do not rub foreign substances on the mesh sheet. Doing so
may push them into the headphones.
mesh sheet
Rinse the terminals and headphone sections of your Walkman with
gentle running tap water.
terminals
headphone sections
If the terminals are not clean, wet a soft brush such as toothbrush with
water and clean the terminals.
Wipe the moisture off the terminals and surface of your Walkman using
a soft dry cloth.
Pat the headphones softly against a dry cloth. Repeat patting about 20
times.
Then place a dry cloth under the headphones and leave at room
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