As I live in hot climate, I've noticed recently that my earphones have some stains inside (on the cloth that covers the internals), because of sweat, I think.
I know I can detach the pads and clean them, but what about this cloth inside? It's a pity I didn't notice the stains when there were smaller, but now I have to solve this problem, and then pay more attention to the internals.
So is there any reliable and safe way to clean this internal cloth?
Thank you for writing in. The headphones materials are resistant to stains but might require some periodic cleaning. A damp cloth would be fine for the outside surfaces but do not allow any moisture inside the earcups. Best recommendation would be to contact your local Bose Support for replacement ear cushion parts.