If you don’t spot any trapped mice after a few days of setting up the traps, then most likely, these traps weren’t in the right spot.
There are also traps that are reusable and those that fit exactly where the nests are. Get the ones most suitable and most effective to the situation.
If the traps aren’t placed near the core areas of a mice nest, it wouldn’t be effective even with bait. Always make sure the traps are in the right spots.