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I put the liner in the machine with some white towels, regular detergent, and 1 cup of vinegar. I had read that the vinegar will remove the soap scum, and it sure did! I ran it through a cycle with warm water. When it was done, I hung it back up on the shower curtain rod to dry. Good as new!
How to Clean Shower Curtains Rid your plastic or fabric shower curtains and liners of mildew and soap scum by simply tossing them in the washing machine. Begin a regular cold cycle, adding a cup of detergent and a cup of vinegar. Once the machine is filled with water, shut it off and let soak for two hours. Then resume the cycle for stain-free results.