Hello, today I was here for your one time service for yellow jackets. You showed me where you were having issues today. I applied a liquid residual throughout the vent and hole where yellow jackets were coming in and out from. Please allow 7-10 days for the product to take affect. Please avoid area for at least the remainder of the day due to yellow jackets being agitated and aggressive. If you have any issues please contact our office. Thank you for choosing Green Pest solutions. Please check email for safety data sheet.