Put out a few snap traps with a SMALL dab of peanut butter on the paddle, BUT DO NOT SET THE TRAP/S!!!
Do this for 2 or 3 consecutive nights.
On the 3rd or 4th night put the traps out again and this time SET THE TRAPS!!!
The mouse/mice will have gotten use to feeling safe around the traps and go right on to them to get the bait, – then… WHACK! – problem solved!