I wouldn't doubt that it is a coon setting that trap off every time. They're tricky little varmints. I've had a lot of luck with box traps baited with cat food. They have to get all of the way in to get the food and when they are all the way in, the door shuts and they're trapped. It takes a lot of patience. I'd suggest just trying something a little different each time untill you come across something that works. Good luck!