[gamin]

The best way to deal with an ant infestation is to find the nest and deal with it there. It is not always easy to find the nest.
I had a bad problem with odorous house ants in the kitchen and bathrooms. This was 14 months ago. I used Termidor SC which is available on Amazon. Main use is as a termiticide but it has ant control labeling also. Caution signal word which is least toxic. Applied it exactly per label instructions. Have not seen a single ant of any species in the house since treatment and the wife is very happy. This product is a bit pricey so buy the smallest bottle. Mix in a 1 gal compressed air sprayer from wallyworld and keep agitated. Label allows ant treatment twice per year. Always follow label instructions. Good luck. Ants are tough and quite possibly the most successful animal group on earth.