You can adjust the strength of the grip of the claw machine. A friend of mine worked at an arcade. He made the grip tighter whenever he had a surplus of prize

You can adjust the strength of the grip of the claw machine. A friend of mine worked at an arcade. He made the grip tighter whenever he had a surplus of prizes that nobody wanted and looser when he had good new stuff. He wasn't even coy about it. He would tell the kids who always hung out at the arcade when he was doing it so they could go nuts.