It's more likely that the poos in her nest are the ones she saves to eat. Really. They have 2 kinds of droppings, one that's not fully digested that they have to re-eat to extract all the nutrients. It's the same things as cows chewing their cuds only they can't bring it back up from the stomach so it has to go all the way through.
How big is her cage? You might want to ease off on the full disinfection every week like you've been doing. Spot cleans should be plenty if she has enough space and bedding and even at a big clean you can put back any bedding that isn't heavily soiled so that she still has her scent on it. That's how they know they're on their own territory and it helps them to feel safe
