Mouse Issue

[Chickie]

I seem to be having more than a normal invasion of mice into my basement this summer. I wonder if anyone else has seen an increase in their numbers and may be experiencing the same? Has there been an explosion in their population this year? I have been keeping traps set 24/7, picking up the bodies and resupplying them as needed with peanut butter. It is turning into a full-time job and have enlisted the aid of an assistant to try to keep them at bay. I refuse to use poison, as it can kill birds, wildlife and pets.