Scientists from the U.S.have developed a washing machine designed for the International Space Station (ISS). It usespressurized steam, compressed air and microwaves. The machine was constructed on the orders of the American space agency NASA.

Until now, the astronauts  were provided with new uniforms and other garments  by the Progress transport ships, which when the clothing was worn out, or simply dirty, got placed together with other space junk in the modules that would be sent into the atmosphere and burne

More at source: GreenFudge