Microsoft, I'm disappointed. I bought a marriage for $50. Headphones lay for half a year, I decided to do repairs, dismantled. Poor soldering of the wire of the left speaker, the connection was held only on the thermotube, soldered, assembled. Now they are working. Do it yourself, like in the old Soviet times. Who cares: the ear pads are removed by turning them counterclockwise, you can wash them, if that.