Good question! I have used chopsticks to put mice in his feeding bowl (essentially a bowl with a lid (with airholes) that I put him in, the mouse in, and then cover with a pillowcase so its dark. He won't eat unless he's not distracted).
However, the chopstick I used to poke him with the other day, and which he kept striking, is a brand new, never used to move mice, chopstick.
I will have to try with a different implement.
As he kept biting the chopstick he also tried to bite a plastic ashtray (purchased new just for him) which is one of his hides. All the time doing the hissing, hooding, I'm a cobra act.
Really would like to get this on video for y'all.