I had the same problem year after year. I live in an old South Philly row home that seems like it was abandoned for a few years prior to my renting it, so literally mouse holes in every single room.

I finally had enough. Last year i Got 20+ white plastic traps from home Depot. Bunch of bags of steel wool and made a weekend out of mouse proofing my house. Pulled all the furniture from all the walls and went around every single floorboard filling holes with steel wool.

Don't forget about behind sinks and gas pipes behind stoves and whatnot. Steel wool around all of them.

Then I laid traps EVERYWHERE. Multiple snap traps along each wall in every room. Seriously all over.

It took about a week, and I think I got like 6 mice in just a few days. Remember to toss the old bait (peanut butter) and put some fresh stuff in each week, they won't go for old bait.

It worked. I haven't seen or heard a single mouse since last year.

Yeah it's a huge pain in the ass to do, and then maintain the bait, but it's so worth it. Mice skeeve me out. And I don't have to bother in the warmer months, pretty much just fall-winter.

Traps DO work. So does steel wool. You just have to go scorched earth on those little buggers if you want success.

Oh and watch your toes walking around at night! Traps EVERYWHERE hahaha.