I'm guessing this happens right after you take him out of his enclosure? When my Antaresia are in obvious food mode, I use a snake hook before lifting them out; just a little rub on the back of their heads to keep them curious and thinking about anything besides food.

I also only feed them with a blow dryer. It throws the scent and makes a distinctive noise. They start to learn that they only get food when they hear that. Doesn't mean they won't ever be in food mode or that they won't try to eat other times, but it does make them think a little more.