I found that the vinegar worked brilliantly. Everyday last year in April, i would diligently spray the entire area where the ants were coming I sprayed about twice a day or everytime i saw them, and after about 3 weeks i had no more for the rest of the summer. I also tried the baby powder which really does make them angry!!! But the vinegar completely worked. I think if you need to get rid of them you have to practically sit over them for a few weeks. Having said all that, they came back again this year so I do feel as if I’m back to square one… but i’ve got my big cheap vinegar and I’m all prepped to get rid of them again.