We had ants like you would not believe. They were in of the house. When we called this place they located where the ants were entering the house and sealed it off. Then they came inside and sprayed. We had to leave the house for the day but when we came back the ants were gone. The smell lingered in the house for a few days but I think that would happen with any bug killer. I would call Simmons & Son for any of my exterminating needs.