Wasp activity in washroom vent outside
Does anyone have any suggestions? For wasp nests on trees and the house I used Raid Max Wasp & Hornet foam spray at dawn. This time if there is a nest it's inside the vent. I can reach it with a ladder but I need to unscrew two screws to remove the vent, then I need to look inside and see where to spray. I will be attacked while doing this. When I discovered the first nest in the compost bin years ago while mowing lawn I was bitten by 5 wasps while running away from the place (the lawnmower exhaust angered them). So, I have a pretty bad experience and don't want to repeat it. Nests on trees were easy to destroy.
Should I call an exterminator? Any idea how much they charge? I wonder how they work. Special PPE?