Get a cat he kills then but I don't have any problem with that.
Here’s what worked for us: https://www.frugalfamilytimes.com/2018/10/how-to-get-rid-of-mice-rodent-proofing.html?m=1
You need to seal even tiny openings into your home. Traps are yucky but better than having them die in an inaccessible spot from poison.
Mix 1 part flour, granulated sugar and baking soda. Place in shallow dish where mice are most likely to find it. You can sprinkle a little cinnamon sugar, chocolate powder or finely chopped nuts to make it more enticing – just add a bit more baking soda to compensate. What happens is when this hits their stomachs the baking soda forms a gas which rupture their stomachs = dead mice