Jack wrote:
So far, he has safely removed peanut butter from conventional mouse
traps on three occasions without tripping them.

If you are using the trap with the metal pedal (not the fake
cheese-looking ones) try putting the peanut butter under the pedal.
Those type trip in either up or down direction & he has to wedge his
nose under to get the bait. I've had good luck doing that.

MikeB