I'm finding mouse turds at random places all over our home. Ticks me off. I don't want to use poison because we have a baby. And besides, when I've used poison in the past, the mouse goes into the wall and dies, leaving a stench.
I've seen these Rat Zappers:
I also have a growing problem with ground squirrels that needs to be addressed the year, and I was thinking of this zapper for the same purpose.
As far as indoors, I would only turn it on at night, which is when the little buggers come out anyway.