Make a wooden box, complete with lid.

Make a small hole in the side of the wooden box, just big enough for a mouse.

Fill the box with lindt chocolate, and put the box in a location frequented by said mouse.

Mouse will enter box, eat chocolate, put on weight, grow too big for the hole, and will be unable to exit the box.

Once mouse is trapped in the box, position it on a desk and force it to read ROF.

Mouse will humanely die of boredom.

Repeat until all mice are gone.

You're welcome.

Put chocolate or peanut butter in a mousetrap.

They like chocolate and peanut butter.

Reese's Pieces are basically mouse opiods.

I was hoping to avoid the gristle of a snaptrap but perhaps I cannot

Yuk

Puts one right off Reece's pieces

Lollers @ Shooter

Dip the head of a mid eighties action man in poison.  It’s irresistible to them apparently. 

Darn Tecco beat me to it and has now made me cry again at the thought of Action Man unloved in a box slowly being eaten.