Use Borax. If you dissolve borax with sugar by heating it in water, you can set small trays of it in their path and by the nest. They'll consume the sweet borax mix and will take it back to the nest. The borax kills the ants by drying them up.
Other than that, if your infestation is well rooted, you may have to remove any ant-infested wood to get at the nest. I had carpenter ants around my tool shop. Their nest was in the oak tree near my shop. I use to put borax-sugar traps all around that tree. It was almost an impassable moat. Only the occasional winged 'queens' would fly over it. Whenever I saw one, my size-12 shop shoe would make them part of the pavement.
My wifey is insisting I tear out the wall to find the nest lol. I appreciate your weighing in with your knowledge. I'm mixing up your potion and Lakota's potion now. I will keep you frens posted as to what worked! Check out this gem. https://www.bitchute.com/video/ppV7axR2ccET/
Trap is set and thanks again my friend.
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