Lower the temps to 86/88 (92 is too hot for a small tub.
Get 1 or 2 plastic flower pot saucer to use as hides (6 inches wide) hides must be tight which mean low profile.
Once you made those changes wait 5 days (NO HANDLING) and offer a live small live mouse, in the evening, in the tub and remove after 10 min if not eaten.