Terro works great for inside the house. You can find it at your friendly Southern States stores. There's one in Charlotte Hall, Upper Marlboro, and Brandywine. It's probably worth the drive to Charlotte Hall. I work at SS (not the Charlotte Hall one), and customers come in looking specifically for Terro. They say it works wonders. Also, if you know where they're coming in the house, you can put a line of chalk (the kind you write with on chalk boards) around the door (or window or crack, etc.). The ants won't walk thru chalk because it sticks to their legs. That works pretty well too. Southern States also has bags of Diazinon for sale. It comes in a 10 lb bag which covers 5,000 sq. ft. You can put it down in a border (4ft) around the base of your house, or you can spread it around the whole yard. We did this at home because we used to have fleas....we haven't had fleas in over 6 years. It kills any insect though...so if there are bugs you want to keep, you might not want to do it. It is poisonous to animals, but water it in when you put it down and as soon as it dries it'll be safe. Good luck!