Large numbers of individual ants can be killed without ever solving the problem. Keep a record of where ants have been seen. Often ant trails enter through a crack but the nest may be some distance away or in decayed or rotting wood of the house. If possible, follow these trails to the nest. Placement of attractive materials, such as jelly, oils, protein and other materials can attract large numbers of ants so they can be followed to their nest.
Children like to watch ants and can be very useful in tracing their trails.
Your pest control company can help you in the control of ants. They can use insecticide sprays, dusts, granules and baits applied as barriers, drenches, nest and bait treatments.