I caught one of the little dears in a humane trap some weeks back, also using peanut butter. He died in it anyway, for reasons that aren't clear to me. He was only trapped overnight, perhaps six-eight hours, so it presumably wasn't hunger or thirst. A broken spirit, perhaps?
I've dealt with mice in two properties - each time by setting half a dozen traps at a time, baited with cheese. On each occasion they'd given up visiting within a week, and a dozen or so deaths. Perhaps the smell of mouse death lingers in the air? One bit of information I was given at the time was useful - a mouse can get through a hole the width of a pencil.
Clearly the solution is to stop jabbing those pencils into the walls. Or at least stop pulling them out afterwards. A pencil blimey. I bet those mice don't hate their bums... [Chalky] Maybe she meant that every woman hates her bum? I say why stop there, obnoxious pseudoscientist that she is...