makes sense since they are from a very hot dry desert.

Dry substrate and high humidity. sounds good. Or no substrate at all would probably work to. Like the screen above heated water method. I guess it's a bit different then western spiny lizards. Their eggs were more prone to drying so half buried in damp substrate was best but you still had to be on guard for that tell-tale musty smell and catch it early.

Hope she lays them soon.