once the mouse is hungry and he always is, he will succumb to the lure of the bait in the trap.
I just zap a small crust of white bread in microwave for 10 seconds, fix it on the the trap, wooden or metal ones. the bread hardens quickly and mouse won't pull it off. always works for me.
was plagued by mice in our new build kitchen, caught about a dozen. was getting fed up of droppings and putting traps down. I cut off their entry points, there were gaping holes around pipework/skirting behind kitchen units, so I sealed all the gaps with whatever I had at hand, unused tile grout, polyfilla etc. I spent one Saturday doing it, time consuming moving the units in and out but it did the job. no mice now in 3 years. I also use a plug in mouse repeller although it didn't appear to deter them before I sealed the holes up.