Activate the cheat 'moveobjects on'. Buy the Noodlesoother or Thinking Cap from the Aspirations Rewards. Get your Sim to put on the item. Then, go to Buy Mode and take off their caps. You will eventually take it off, ven the hair too. As a result, your Sim will get bald! To cancel this glitch, do not delete the cap and put it back onto your Sim.