R.C.
Hi I had this problem a few years ago with the big black carpenter ants for 3 yrs straight. I tried everything there was out there i could find. I finally found this stuff called Terro it came in a liquid form that ya put on pieces of like poster board that came with it i put it out where animals or kids couldn't get to it but where i seen the ants the most. They ate this stuff up like ya wouldn't beleive and within 3 days they were gone. And it stayed that way. So ya might wanna try Terro ya can get it at Aco or Meijers that i know of. Good luck