While laying off food is normal, becoming lethargic is not. Please keep an eye on that.
We use a large rubbermaid tub , half way full of a mix of organic soil and playground sand , mixed with sphagnum moss. Kept moist , with an under the tank heat mat made for fishtanks. You can cut a large hole on one end or in the lid for them to get in and out, some prefer no lid... but they do make a mess. :) Make sure dirt mix is free of fertilizer and pesticides.
Bathing often helps and allow them as much activity as possible. Exercise helps move the eggs down where they need to go , builds muscle and also helps them cope with that rooted desire to search for an appropriate nesting place.