Many people try to tackle this problem with over the counter baits and sprays prior to calling us. The problem is that over the counter baits are usually too strong, causing a large initial die off which signals a stop feeding behavior from the ants.
Over the counter sprays are worse, the chemical compounds in over the counter sprays are repellant. They kill some ants but they chase the rest away and often splinter nests. Instead of having three or four queens nesting together you could very well have three or four separate nests in different areas of your home.
In both instances, you may stop seeing the ants, but that does not mean they are no longer in your home.
We use a combination of slow acting baits placed in cracks and crevices the ants can get to, but that are safe from children and pets. Foraging ants pass these materials back into the colony killing other workers and egg layers. We combine these very effective baits with super low toxicity, no odor, no fume, non repellant sprays that the ants cannot sense.
Due to their habit of re-infesting, and the fact that your ants may be part of a much larger super colony, we often recommend follow-up services to prevent your home from being re-infested from this pest.