I have a carpenter Ant problem in my home and lawn. Two weeks ago I bought a 25 lb bag of Diazinon and spread it around the perimeter of the house. It has since rained REAL hard a few times. I also got some aresol spray (ant and roach killer) and sprayed all window sills and door sills. I have them now and then in the house, but most crawl in (through the barriers) I guess, and die in the house. I was wondering if there is a chemical (liquid or granular) that can be applied to the lawn and what can I use around and in the house? Dont want to spend the $250 for a pest control company if I dont have to.