It has to be snap traps, I've decided. If you use poison, they just creep away and die and then you get the smell. The sticky traps mean you have to dispose of wriggling mice. Over years of warfare I've decided that you can keep the numbers down, but not quite out. Mine live in the boiler, nice and warm and safe. As recomended, box up all food. The price of freedom is eternal vigilance, as someone said Lynne