said by aurgathor 
:Spraying the perimeter is utterly useless if they're already resident in the house. As for baits, they don't work too well with well established odorous ant colonies, unless you can pinpoint all their locations. And when you "see the occasional ant", that's most likely just the tip of the iceberg.
I thought they were mostly gone until I did some work on my ceiling one day...
Well, it's worked for me. Since we started doing both treatments I have not had the ant trails all over my kitchen counters and basement floors that I used to have. I think what we have are Pharoh/ferol/whateverthey'recalled ants. Still, I know it's an ongoing battle. They may still be in the house but as long as I don't see them....I can live with that.
