When cool, no sun on cover, use a car wash attachment, soap dispenser sprayer with a bit of bug spray in the mix. From the ladder spray good though the little vents. Maybe from both sides. Wait a few minutes after not seeing any more wasp perhaps tap the cover with pole.
Rinse out with the hose so no soap or anything else is going to possibly damage anything in the sun.
Tap shroud a couple of times to make sure no more wasps. Some may have been out while you were spraying and return during or after.
It will be a mess to clean out of the shroud.
I like the CO2 fire extingusiher idea if it wouldn't make the shroud, and anything brittle or something.
Anyone know?
