I had a critter problem in one old farmhouse that the Bride and I rented many moons ago. The house had sat empty for many years so it was a Holiday Inn Express for rodents.
The most effective trap for all critters was two medium sized wood base spring traps positioned facing each other with one edge elevated. This formed a narrow "V" path that the animal had to travel to get to the bait. Seeds seemed to be the most effective bait with a gob of peanut butter on each trap. Mr. Rodent would enter the V path and invariably spring a trap. When the first trap sprung his body would contact the second trap and lights out for Mr Rodent.
These were the Golden Nights of living together, all alone in an isolated farm at the end of a long driveway, snuggled in bed with the occasional snap-snap of the traps. We soon eliminated all of the critters and life was never as exciting or as cozy, again.