Well this is what i did, when i first switched to f/t my male pastel was all over it! But the last three feedings he acts much like yours, acts interested but just wont strike at it. So i adopted the if he is hungry he will eat it theory of just placing into his enclosure, on something of course. I just throw it on top of one of his hides and leave. After about an hour i go to check up on all of them since feeding day is the same for all. Low and behold everytime it is gone! I can do the rat dance for 5 min at it does nothing, i think its a comfort issue because i believe they know you are there watching closely since we are playing with the food and it freeks them out. So you could try this, maybe it will work for you to.