The best thing for ants, hands down, is do-it-yourself Terro.
Born Secular
1
I get nervous with that stuff around my cats (and infants crawling around). Generally good cats who don’t visit the countertops all that often but still. I had an ant army visit my place but since we own it I bought a few tubes of clear caulk and played the game of “follow the ant trail” to figure out where to apply it to both the inside and outside of my place.