Best answer
Once a year
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How often should you wash your shower curtain liner?
Although there’s no official specification for how long a shower curtain or its liner should last, TODAY suggests that you try to wash your liner regularly, as often as once a week. I know, I know, this seems dramatic.
When should you replace your shower curtain?
Replace your curtain when it looks worn or when washing no longer removes stains. Plastic, vinyl, and other synthetic materials are excellent for those of you who might prefer water-repelling shower curtains. Water beads up on the inner surface, however, so you will want to hang these types of curtains closed between showers to allow them to dry.
How do you clean a shower curtain liner with baking soda?
Remove the rings, then toss the curtain and the liner in the washer along with a couple of white towels. The towels will provide extra scrubbing for better cleaning. Add the regular amount of detergent and -1 cup of baking soda. Wash in warm or hot water at the highest level. At the rinse cycle, add -1 cup of distilled white vinegar.
What happens if you don’t clean your shower curtain liner?
If you don’t clean your shower curtain liner, NBC News reports that you could be at risk of skin, throat, and eye irritation from the mold.