Good morning, I was here today to complete a one time service for bees. I inspected the exterior large window of your home and observed yellow jackets coming in and out of a crack in the corner of the window frame. No activity observed inside the home at this time. I applied a liquid non-repellent solution to the exterior entrance exit point for yellow jackets. Please allow 3 to 5 days for best results. Have a wonderful weekend. Thank you for choosing Green Pest Solutions.