Warm water sprayed out of the top, and fans drew the water downward through a drain. To compensate, the Russian space program provides the crew with disposable cotton underwear. In 1997, the space cargo vehicle Progress delivered some 1,355 pounds of underwear to Mir. In space, things like razor stubble and toothpaste suds don't just fall neatly into the sink. In weightlessness, things like stubble and toothpaste suds don't just fall neatly into the sink.
Crew members have to capture trimmings and clippings with a vacuum cleaner and spit into a towel.
As you might imagine, going to the bathroom can be a major production in space. The WCS has a separate urinal and commode. The urinal is essentially a vacuum hose to which astronauts attach their own personal funnels. Fans create suction to draw wastes into the commode. Liquid waste is emptied into space.