I'm at my wits end. We purchased a home 7 months ago, and I can't get rid of the mice. At first, it wasn't terrible - we would catch one or 2 and then go almost 2 months before catching another. We have cameras in the crawlspace and garage, traps in the garage, crawlspace, both attics, plumbing door behind the shower. In the beginning of June, we had one that jumped over every trap on multiple nights, but was never caught. I've had 3 different exterminators out. We've sealed up every hole, shoved Xcluder steel mesh under the bottom of all of the siding and in the corners of the home exterior. Steel wool or copper around all of the pipes leading into the home. Xcluder garage door shield. Had a professional exclusion company come out in April who actually told us that we didn't need them because we did everything they would have done. There are no trees or shrubs around the house.
Since the beginning of June, we've seen 10 of them. Caught 5 (only 3 in snaps, but 2 in glue - which I hate, but they are avoiding the snap traps. We are alerted of the motion on the camera and we euthanize it immediately). 5 have jumped over every trap. All of these mice are in our empty crawlspace. The crawlspace is interior access only, so it's not like one of those dirt crawlspaces that you reach from the outside. The vents are fully screened. It's concrete and cinderblock. It's dry. No one lives in the house yet, but we are there daily. It's clean, no human food. I think they hoard seeds from neighboring bird feeders because we see some around.
I have a highly recommended professional pest company who set up traps in the places that I can't reach and set out bait stations. A lot of them. They are eating the poison, but it's been 2 1/2 weeks and we are seeing more now than ever. 4 just this past weekend, and one got away. They came back and set up external bait stations a few days ago, but I think these are living inside the home.
All bait stations set up in other areas of the home are untouched. Even the garage. So far, we only see activity in the crawlspace.
The exterminator set the traps without bait, because they seemed hesitant with the peanut butter and it seemed to stop working. But they are sniffing and avoiding the unbaited traps just as much as the baited ones.
I don't think a full exclusion is possible with the home unless we rip out the deck, replace all the siding, etc. It's just an old home.
What can I do? Besides move. Cats aren't an option either.