The Xbox 360 port of The Sims 3 is a significantly stripped-down version of the PC original, and functional laundry appliances are among the missing features. Console players cannot purchase washers or dryers.
Dirty clothing in a Sim's inventory offers a "Clean" interaction that instantly refreshes the outfit with no equipment required.
Sims can "Wash" clothing at any bathroom or kitchen sink. It's slower than a machine but gets the job done.
Simply changing into a different outfit at a dresser or wardrobe swaps the Sim into a clean version of that clothing.
The PC version gains fully functional washers and dryers through the Ambitions or Parenthood expansion packs. Console players are left to micromanage hygiene manually without the convenience of laundry appliances.