A few weeks ago I got some helpful assistance in this group as I looked for new bait poisons for eliminating my kitchen ants. In past years, poisoning the ants had resulted in the ants going away for about a year. This time, the same poison failed. I tried every ant bait in my local store, and then I ordered a few recommended on this group. Alas, they all failed. Most of the baits were of no interest to the ants. One of the poisons, called Terro, was devoured by a large column of ants. The ants ate most of the contents of 6 canisters of the poison. The ants kept coming.
I finally gave up and changed strategies. I bought a gallon bottle of ant poison with a plastic hand operated sprayer. I sprayed the entire perimeter of the house. The ants were coming in from the roof, so I also clipped off the branches of a tree that was touching the roof. Lastly, I sprayed the edges of the roof all the way around. THE ANTS ARE GONE. They have been completely stopped for over a week.