Is There An Easier Mouse Solution? ;)

The only thing I know of that works for sure is prevention such as physical barriers (sealing up entry points), not leaving accessible food in the unit, and baited traps if you find evidence of their presence. Cayenne pepper sprinkled at their possible point(s) of entry can be downright unpleasant for them, too. I stay away from poison because I don't want them going off and dying somewhere I can't find and dispose of them. There are online videos of tests of various scented and sonic repellents and commonly recommended home remedies that show a low success rate. In some cases the mice made nests out of the supposed repellents such as dryer sheets or scented cotton balls.

As for simply equating correlation with causation, that would be like me saying I carry an anti-grizzly bear charm in my pocket and I've never been attacked by a grizzly, so the charm must work.