You can try mixing some sphagnum moss in with the substrate to stabilize humidity, or just put some sphag moss in a low, wide bowl and keep it moist.

I wonder whether your snake is feeling secure enough to eat - they like hides that touch their back and sides, so you might offer her something that can do that, and perhaps add a little more clutter to the tank. Then give her several days of peace and quiet before offering food.

This stickied post by Deborah still comprises the best advice I've found about how to persuade a reluctant youngster to eat: https://ball-pythons.net/forums/show...-hatchling-101