How big is her house? They like to build a big nest in winter to keep warm. If the house isn't that big, would there be room to put a shoebox house in instead? I gave our Syrian a bigger house and put a bendy bridge tunnel over the door so it was dark inside and he moved his nest inside it
You cut the base out of a shoe box and a door in one side and have that on top of the substrate. Keep the lid to use as a lift-off roof. So you can check inside occasionally rather than lift the house out, so her nest stays in tact. If you put a bendy bridge over the door she'll probably move in (the tunnel entrance tempts them