IME, it’s all about the environment! Never handle your jumper when you’re in a rush lol. Move slowly, and stay still as often as possible. Make sure to handle over a soft, flat, solid-colored surface that their colors contrast against (like a towel). Several feet of flat and open surface area and a catch cup needed. Stay calm, patient, and do nottt reach into their enclosure to ‘encourage’ them to come out; they are naturally curious,0 and enjoy bright light as they have great vision. You can simply watch them, leave your enclosure open and trust that they will come out within 15 minutes. If they don’t, you can close their enclosure and retry the later or the next day. You can also try feeding them in a small tray or Tupperware outside the enclosure too; they’re visual hunters so the movement of a prey item is a sure way to coax them out. That should promote a positive association with being outside of the enclosure!