Since 2020 it has been a little worse. I chalk it up to Wife's cat passed, and the neighbor at the end of street started to raise Chickens,etc.

We saw a lot less Squirrels this year so that might also have something to do with it also.

I added steel wool to any places they might get in from, the block foundation (cinder block) holes will be next, And a better tighter seal at bulkhead door.

I use a 5gallon bucket drill 2 holes at top (1/4" if that from top) so a dowel can roll in the holes at bucket top but not roll off bucket like just laying it on top of bucket it might., a ramp to get to the dowel and peanut butter on dowel, water in bucket, with a slightly smaller bucket in the 5 gallon , with holes 1/8" drilled in the bottom of the smaller bucket. and one is in basement, one in garage. If a mouse get in, they go for the peanut butter, the dowel spins, and they go for a swim, and come to an untimely end, remove dowel and lift out smaller bucket with the "catch" let water drain out, and send the Catch to the trash barrel. put bucket back, put dowel back and reload with peanut butter. At first had to clean out buckets once a week, now maybe once every 3 weeks (garage) and off and on, in house. Seems after a lot of rain, the house one would have a few catches. but that is about it.