In my experience, the best way to get rid of ants is to find where they are getting in and trace their supply lines back to the colony where you can dig it up and kill the queen. When I was little we had an ant problem in our house and one evening on the back patio I laid out an oreo, a strawberry, some saltines, and a few other snacks to see which ones the ants would like the most. The next morning our patio was a literal carpet of ants. The oreo and strawberry were long gone and they were working on the crackers with less enthusiasm. Following the ants we could see that the colony was underneath our green turtle sandbox off the end of the patio. Pushing it aside revealed the most intricate and bustling ant colony I've ever seen -- with separate chambers for eggs, larva, and pupa and tunnels interconnecting them across a 3 foot radius. Sadly, this colony was a big problem for us so my mom and I dug into the chambers until we found the queen (the one ant 10- or 20x larger than the rest) and then we killed it. Within weeks the colony was collapsing and our years-long ant infestation was resolved.
Since then everything about ants has been fascinating to me, from their physiology as this article gets into, to their behavior and organization. I even made a web game about ants at antocracy.io where you control a queen ant and use pheromones to influence your otherwise-autonomous workers.