Have you considered moving her to a tub set up? My first snake was in a tank and also had an extended fast. Moved him to an appropriately sized tub and let him settle in for a week and he ate.
You can also try the newspaper trick. Fill the tank with crumpled up newspaper to the rim. After a week, drop in a mouse and leave the room. Check back in 30 minutes and mouse should be gone. You can then slowly wean your snake off the newspaper by removing a piece a week.
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