Through the past week an a half my family and I have found yellow jackets in and around our house. I woke up and found at least 10 of them in my living room. After killing them we found a swarm going into our second floor window sill. We have sprayed three cans of Raid Wasp and Hornet Killer, but it did not work. We keep finding more and more bees finding their way into our house. We have no idea how long this nest has been here, and we cannot use some of the suggestions listed because it is on the second floor. PLEASE HELP.