I don't have a Jackson I have a panther but my guy boycotts crickets every few weeks. I just stop feeding them for a few days then try again. If I keep trying every day he won't touch them but if I back of for a few days he seems to get re interested. If he never touched another cricket I would look for another crunchy feeder to replace the crickets like roaches. It's also nice to have something to gutload with a good variety of nutrients. You could gutload supers but they are still squishy. I think at some point you would want to add some chitin. I think just worms for a few days or a week, while you are giving him some time off from the crickets is fine though.