Maybe tweak the temps a little. I do 84 for the day and 77 at night. Are you feeding at night? Pacman are very lazy. Mojo might move an inch to grab prey. When he is full he moves back an inch right back to where he was. The nightcrawler pieces might be too small for the effort for him also, maybe try bigger chunks. A half hour before I feed Mojo I always spike the humidity up by spraying everything down.