Here is PQ ants outnumber people 10,000,000 to 1…the only thing I have found (and I have tried everything) is calling Corkies in April, having them spray in April and May, then once more around July or August, that usually takes care of the ants for the year. We live on PQ canyon, so they are everywhere. Corkies is all organic, and it does not harm our dog. Not an ad for Corkies, they are just one of the companies…$59.00, three times a year, and no headaches. It also keeps bugs off my roses, a definate plus!