@Deb3312 Either just plain crazy, or crazy like a fox, and is going to try to get a full refund, making all these false claims.
What I don't understand is why you apologized and said you'd review cleaning protocols with your cleaner, if you cleaned it yourself? That was a really bad response, as it makes it sound like you have a cleaner who could have done a poor job.
I would have just said that you did the cleaning yourself, so you can verify that the bedding is clean, and the entire house was cleaned to your normal high standards, which previous guests have always rated highly. But that if she would like you to come over so she can point out what she thinks isn't clean, you'd be happy to reclean it.
I might try to pre-empt such a possibilty by contacting Airbnb (in writing, so there is a record), to report this guest's unreasonable criticism, pointing out your high ratings, and written reviews stating how clean guests find it, saying you just want this on record, in case she tries to convince a CS rep of these lies.
In the future, if you get a guest who right away starts off with complaints, it's best to cut your losses, and get rid of them ASAP.
"I'm sorry you're displeased, I've never had such complaints before, but if you aren't happy with the accommodation, I suggest you cancel immediately and you will receive a refund for unstayed nights".