Bide your time. Pack your sheets and comforter away. Don't let on that anything has happened. Thank her profusely and let her know anytime she needs you to reciprocate the favour, you'll be more than happy to help her out.
If and when that time comes, she'll surely leave you some way to contact her so, it's time to return the favour. Call her constantly with shit similar to what she bothered you with. While she's away, remove the bedding from HER bed and replace it with the shit she left on your bed. Take a replacement set of hers that you like, either similarly priced or even more expensive as compensation for paying her and her not doing the job.
You say she's OCD about her place? Be sure to leave it a disaster. Unwashed dishes, garbage not thrown out, a couple of used condoms strategically placed. You get the idea.
The choice to leave her a note or not explaining your actions is up to you. If you don't, when she calls to give you shit, say something along these lines..."I'm so sorry. I wasn't sure how to approach you when you did this to my house last time...remember? Now I'll know how to handle it better next time. Thank you. I love my new bed set by the way. Thanks again."
Chances are you'll never hear from her again.
