Who cares?

You're an adult.

She's an adult.

If it really bothers you, pull her aside, thank her for helping with the laundry, tidying the laundry area, and securing the cord with the device. Ask her if she wants to talk about it, she likely won't, then give her a hug and thank her for being awesome.

Don't make this a big deal. You are a human. You have needs. And you know how to take care of your needs - that's a good thing.