How can i remove dry rotted elastic from nylon nightgowns?

Why are you keeping a nylon nightgown with rotten elastic? If the elastic is sewn to the gown, it will be time consuming and probably not worth the work.You will have to remove the elastic from the nylon with a seam ripper and stretch stitch new elastic onto nylon. If the elastic is enclosed in a casing, just make a small opening, cut the elastic and pull it out.

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