think she needs a slightly moist substrate (peat/moss or peat/sand mix). A laying-box is recommended as it is always easier to find eggs after laying. If you use such a small plastic-box filled with substrate, but keep the rest of the substrate more dry and low, she is 'forced' to use the laying-box. But i have no personal experience with androyensis, so i have no idea if this species likely uses a box. I would offer two small boxes at different places in their cage (different temperatures). Box should have only a small entry, so she feels safe in there.
Sebastian