We've had small amounts of mouse evidence for some time, and were not too fussed as long as it kept to itself and didn't disrupt our cupboards. And it hasn't.
But I just saw it creep out from behind a speaker. I screamed, threw my empty spew bucket at it, and it ducked off. Of course it made its appearance right after DH left for a conference for 4 days, so I'm dealing with it on my own.

It has to go.

What should I do?