My suggestion: hire an expert. We had mice galore until I hired a local company. They came and put new screens over the air vents to the crawlspace and the attic. They filled in many other small holes, such as where the electric wires used coming through the wall. They did some carpentry on the kitchen floor, and various other things, and they set traps. After a month or so the mice were gone. Except for one rat. She came out every night and took several bites out of a mcintosh Apple. Always a mcintosh. One morning I caught her and chased her into the bathtub. She could not get out. I called the exterminator. He came by with a humane trap, put her in the back of his truck and drove her off into the woods. I assumed he would kill the poor thing, but he drove off with her still alive.
Those traps were baited with peanut butter. We caught many mice with them. We have not had a problem since then. The exterminator told me the secret is to keep vermin out. The same with roaches. He said a rat can come in through a hole the size of your thumb. - Jed
