If you prefer paper towels, all you need to do is add a humid hide to her cage: you'll want to use a large enough new plastic food container, the kind with a top
on it; cut a doorway big enough for your snake (with a meal) to easily go in & out, and fill it halfway with sphagnum moss that has been soaked & mostly drained.
You'll need to re-hydrate the moss periodically, but unless your snake uses it for a bathroom, you can re-soak & re-use it for quite a while before replacing.
Having a humid hide in the cage at all times will add to the over-all humidity in the cage, but snakes that like humidity will often seek it out as their favorite hang-out.