Like feeding your monitor more often and seeing how that effects its feeding responce. Or let the monitor bite your hand and learn its not food. As you have taught the monitors that it is food. Of course, you are smart enough to protect your hand(I hope)
Once for fun, I taught an adult male peachie(one of my favorite monitors) to open my hand with its hands/claws. I wore welding gloves(I weld by the way and will be doing so in a few minutes) I would keep a mouse enclosed in my hand and would only open it when the peachie used his claws to open my hand. He would try to pry my hand open with his nose(that is really funny) and once he learned my hand and glove was not food, only mouth my hand when he got really frustrated. Soon he learned to use his claws first and did so repeatedly.
What did I learn from this experiment? Well, I learned if you feed your monitor everyday, they will learn exactly what to do, but if you allow the monitor to starve, that is, go several days, then their hunger overwelms their training and they revert to basic instints and attack anything that comes in the cage.
So your answer is here, you can train your monitor. You can feed it more often so its not starving. Or something else, because its a reptile and all behaviors are temperature dependant, you can lower the temps and not have that problem. Good Luck FR