Poke'em with a stick JK

If you are feeding them cool from the fridge let them warm up a bit so the start moving. I "hand" feed sometimes in a plastic (not reflective metal) spoon and you can roll them around a bit to get them moving. It is much safer than tong feeding. If you are feeding superworms the Shooting Gallery Feeder use your screen cage as a place for them to climb up and get picked off. I even put my BSFL in there but mine seek them out BSFL don't climb.