He wasn't in his hide at the time. And as soon as my hand entered the cage he sprung for it, and after failing he was going right back up to do it again. I think I'll pass on this one
Plus I really don't to stress him out by coming after his head.
It's actually not a bad suggestion. I have used a roll of paper towels if cleaning to lightly touch them on the head, or a water bottle to lightly touch the top of their heads.