Watch this video to learn some more about the materials a pest control company might use to control an ant problem. Some exterminators may use bait to lure and kill carpenter ants. Many exterminators will use a type of insecticide or dust in which the ants might walk. As the ants walk-in or get sprayed with these insecticides, they will clean themselves and ingest the chemicals. Soon, the ants will begin to die off, and your infestation should be over.