What type of building do you live in Andrew? It might help to find where the mice are entering and block off those access points. The building I lived in previously was really old and had a lot of cracks in the walls. I suspect, if I had chosen to live there longer, the mouse infestation would be a reoccurring theme each winter. If your building is really old and run down, may be you should move at the next convenient time? My experience was a good learning experience though. It never even occurred to me to inspect the house for cracks when I first moved in. There isn't a hope in hell that I would move into such a run down building again in the future after the whole mouse fiasco though. It caused more problems than just having mice. They more or less trashed our garage and it smelled like barn for ages afterwards. The landlord was really pissed off.