Got dirty shower curtains? You can bring back your shower liners and curtains back to a beautifully clean state by using a cup of baking soda (some people recommend vinegar instead) and washing them with a load of white towels with a regular amount of detergent at warm temperature. The additional towels will keep the machine from tearing apart the curtains while also helping the agitating cleaning action. Afterward, just hang them to drip dry and you've got renewed plastic or vinyl shower curtains.