Diatomaceous earth sprinkled around baseboards and entrances so they will come in contact with it. Caulk all seals. You can sprinkle around house perimeter as well.
Try a product called Terro.
Terro makes many types of ant bait traps and I like them all. I’ve used other brands and they did very little.
Here's a simple Homemade ant killer
Hi Jerry - 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. It's even been featured on Hometalk! Hope this helps! Hugs, Holly
PS - We have a FREE eBook with recipes for all of my homemade and all-natural cleaners. You can download it here --> https://pinkfortitude.com/thank#GreenClean
Use bug bombs