Good morning, it was nice meeting you today! I completed your service for bees. I treated the bald-faced hornet’s nest above the second-story window with a liquid residual. Please allow five to seven days for full effect. I removed as much of the nest as I could, but due to the height and awkward location, I was unable to remove all of it. I recommend waiting a week before attempting to remove the rest with a power washer, if necessary. If you have any questions or concerns, please give us a call. Thank you for choosing Green Pest Solutions!