Stop in for a cup of coffee

I think the foam type spray would be the best bet, and well after dark. Buddy of mine uses a shop vac, lets it run by the nest opening for an hour. Grabs a can of raid and sprays into hose the second he turns of vac, as it could explode otherwise. At the very least shoot fire. Stuff a rag in hose and let it sit for 24 hrs.