Well, I use poison and you are right they pong a bit and there are flies, friends of ours use traps and winkle their little crushed bodies out of them and reuse them.........
We tried the humane traps and one morning there were 6 mice in there, DH took them 5 miles away and released them, 2 days later we caught, yep, you’ve guessed it another 5.
I also have the plug in things, they don’t work either.
This summer we are going around the outside of the house trying to stop up all the tiny gaps to try prevention rather than cure, but we live in the countryside and all our neighbours are in the same boat.
I just lay in bed in the Autumn listening to them all above my head moving back in and dragging their little suitcases across the floor ready to settle in for the Winter.
We’ve lived here now for 20 years, we never had mice in any of our ‘town’ houses, so I guess we just live with it, I dread to think what they might be doing to the wiring though.