Good luck with any deterrent. I have heard mothballs are totally ineffective as are dryer sheets. I work hard at keeping any sort of food out of the area, and I have traps set in the garage in likely locations.
My best deterrent is our dachshund, and he is my early warning system. When he goes on patrol and shows the signs of a mouse hunt, I go into full combat mode and set more traps.
Reuben really loves mice as a tasty snack.