Everything I have read says they can be re-used with some success up to 4 times.
Here's a post that lists ways to reuse them for other purposes if you're interested. Hope it gives you some inspiration, Julie! https://www.onegoodthingbyjillee.com/11-uses-for-dryer-sheets
You can use to wrap up small things for storing.
I use them for dusting my baseboards sometimes. They're supposed to repel dust. I'm not sure how well it actually works.