I would put little ant stations about. They’re pet friendly too. There’s that good stuff in the stations called Nippon that ants love and take back to their nest to kill every ant in that nest.
Not sure where you from but Amazon UK do them or you may find them on another online site. My local Tesco’s do them too.
https://www.amazon.co.uk/Nippon-Bait...%2C129&sr=8-10