At this size it should be attacking everything including fingers from my experience. If you answer the trouble in the enclosure questions it would help. The humidity and heat are my main concerns. That line just looks to be off not its back imo from those pics. Crickets suck unless you properly gut load them. I would try something along the lines of a Canadian night crawlers as a main staple then toss dubias, etc for variety. These things usually eat you out of house and home. So it not eating consistently is a concern to me.