After he strikes and coils, I would close the bin and not look at him (no peaking!) until the morning. Sometimes it takes them a painfully long time to eat which our patience can not handle and we think we have to reach in and re heat and try again. Just walk away.
I thought I had a strictly live feeder until I tossed in a ft mouse and left it overnight.
I doubt it was too big if it was the same size as last time.