I started using one of those electonic plug in...............walmart has them 4 in a package for $18.00 plus tax.......no ants
and they have a can of spray foam that I opened the sink cabinet and filled in around the pipes in & out and the same thing in the bathroom under tub and sink. I also get the vacuum cleaner out and vac after dinner.
For outside away from the house.....they can digest raw cornmeal. Forgot to mention they do not like vinegar spray.