Durable and suitable long

The suitable replacement baits for the ingenious mousetrap to last and are many times used. Before, I had to re-equip every day with perishable bait and hook the classic mousetrap. This is now an end, which may fall practically "watch" throughout the year in the shed. I have many mice thus caught, the damage caused by these small and pesky rodents have gone lately de facto zero. Something struck me: during the last frost I have not caught a mouse. This may either be because the bait frozen its ingredients does not release, or it was the mice simply too cold.