1/2 cup detergent
1/2 cup baking soda
Fill the washing machine with warm water and add 2 large bath towels. Add detergent and baking soda. Put the shower curtain into the washing machine. Run through the entire wash cycle; however, add 1 cup vinegar to the rinse water. Do not spin dry or wash vinegar out. This method will not work without the bath towels. Hang the shower curtain immediately. Wrinkles will disappear after the curtain has thoroughly dried.