Wash the shower curtain with a mild detergent and a dash of vinegar on a delicate cycle. hang it to dry and will be as good as new.
Shower curtains are like new by washing them in the washing machine at 40 degrees. with a tablet for the dishwasher.
Removes limescale and other stains and become soft.
Fabric shower curtains in a bucket with hot water and put Steradent tablets and leave overnight. They will become pink but you can wash it out in the washing machine.