I have ants.... at least I did.
A few days ago I put out cotton balls on my kitchen counter with a mixture of water, borax, and sugar. I have to tell you, I haven't seen an ant in DAYS! SO HAPPY! And it cost almost nothing to make. I already use borax in my laundry as a deodorizer because I don't use fabric softener.
Here is a video of Greg the Gardner with the instructions on how to make it. I didn't put it in a spray bottle. I just soaked cotton balls in the solution and places them on little lids where I had problem areas. Every morning I re-soaked the cotton. It TOTALLY WORKED.