Put some peanut butter so the mouse could smell it.  Caught one mouse one night and then caught another mouse the next night.  Dropped them off about a mile away.  Hope they find each other.  I read that mice can't find their way back if you take them 3500 feet away so I figure a mile should be good.  Haven't seen any signs of mice now for a while.  Glad I got this, it has more room for the mouse than those little plastic humane traps.  I had one die in that kind and it wasn't in there very long.  This is much better.  The mice didn't seem as stressed as in those little ones.  This is a good humane trap.