How should I clean the WH-1000XM4 headphones?
When the outside of the unit is dirty, wipe it with a soft dry cloth. If the unit is particularly dirty, soak a cloth in a dilute solution of neutral detergent, wring it well, and then wipe. Do not use solvents such as thinner, benzene, or alcohol, as they may damage the surface. (Page 1)
From the official Sony WH-1000XM4 Wireless Noise-Canceling Headphones manual, page 1
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