Mildew on Bathing Suit?

My cousin wanted me to write in and ask how to get mildew off of pocket books. Her daughter's bathing suit has it on it as well, and she was wanting to know how to get it off.

I suggested vinegar, but she wanted more than one opinion, in case the vinegar didn't work.

So what have you all got for her?

Thanks for everything.

Have a good day.
Teresa from Va.