J.Y.
I am with you. I am a neat freak, especially in my kitchen and could not believe that I had mice. I had an exterminator come and he put out packets that they open and eat. It causes them to be thirsty so they go outside and drink themselves to death. They should not die in the house- I did find one dead downstairs, but I think my dog scared it to death rather than the poison. The packets were not quite quick enough for me- I also put no see no touch kill traps every where I saw mice droppings. After you've been free of fresh droppings, seal any areas you can identify where they may have come in. I've been mice free for a few months now, but still keep traps and poison packs set in case they decide to come back.