Check this out: https://www.hometalk.com/42072550/how-to-get-rid-of-ants-from-your-home-without-chemicals
Caulk & seal all openings. Put diatomaceous earth around the edges of entrances and baseboards. You can also put it outside as long as it doesn't wash away, it is still effective if it gets wet.
Outside I use Terro sprinkle compound. Inside sprinkle Jiffy Muffin Mix where you see them and along baseboards. They take it back to the nest. They can't digest it and they die.
I use a chalk line in front of my front door and back doors. Ants don't like chalk.
It does work.
Hi Theresa - Those little buggers are relentless, aren't they?!? This is the most effective method and all-natural spray DIY that we use with ants. It's best indoors, but will also work outside with more frequent applications. Hope this helps! Hugs, Holly