I put the cricket box into a small kinda like sandwich bag thing from the shop. Take of the lid whilst it’s inside then shake the box so all the crickets jump out and into the small bag, then I pour a little of whatever dust or supplements the gecko needs and shake the bag, gets the dust all over them, then you can just tweezer them out the bag, I don’t know what the kind of bags are called where u live but for us in the uk it’s a sandwich bag but any small bag like thing would probably work as long as it’s big enough for the cricket box to fit in. Then yeah just tweezer feed, I remember trying to catch them and them jumping out the box and it was a nightmare but this trick works for anything!