I have to confess to resorting to poison up at the church when the traps didn't work, but they were chewing the organ stops! They also nested in the boiler house by pulling the insulation fibres out of the back panel of the boiler.

Unfortunately I have had to resort to poison at home. Not for mice, but for the rats that have moved into my garden shed. There were barns pulled down up the road during the summer, and I think they have come from there. I could tolerate the rat I saw in the garden raiding the bird food and eating the windfall apples, but when the perfectly round, rat-size hole appeared in the door of my brick-built shed, where it's crammed up with all sorts of camping gear (and the coal), I had to get heavy. I disposed of one body in the garden incinerator last month, and put the stench in the shed (as mentioned by Mudlark) down to probably unfortunately having clobbered some mice as well. (I know the stink one dead mouse can make as one got trapped in a teacup in the box of crockery in the vestry at church last year). This week my daughter's boyfried narrowly missed a rat with the coal shovel while in the shed, and heard another in the back corner, so the poison's gone down again.
Once I think I've got them, I'll have to block up the hole in the bottom of the door. Still, if they chewed through once...

My husband once shot a mouse in his room with an airgun while he was working in Iran. Many years ago he also stamped on one in our house when it made the mistake of running between his feet while he was working in the shower room. I got the call, "Fetch me up some kitchen paper and don't let the kids see!"

Andrea (Who used to have a pet mouse).