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If you have tried all of that, and your still getting rats and mice, there are only a few ways to go, I know because I had problems with them myself, forget the spring traps, there not sensitive enough to work like they should, the 3 best ways to kill them is to first (will take a week) is bated poison, if you want something fast working with intimidate results, then a glue (or sticky) trap (you will then have to kill it yourself, as it just glues them alive to the board) then there's the electric trap, this will kill it with no blood mess or guts, and it works great, you'll get about 20 kills before you change the battery on it, I could show you picks of the ones I caught on the glue trap