3 mice so far tonight. Damn. The problem is really worse than I thought. I might need a multi kill solution. It was not this bad before.
I need to try to isolate where they are entering, garage would be the easiest to isolate, I need to put a multi kill trap in there and bait it really good and see if I stop getting them in the attic.
I'm thinking something involving high voltage.

Just need to build it safe... I need to consider what happens if it sets a mouse on fire without killing it, for example.