I've found the best way to get rid of them is to pour boiling water into the nests.
Hi Florence - 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
Here's a good homemade recipe to get rid of ants
Here is an idea from Pinterest https://www.pinterest.com/pin/243053711126539595/