The wasps/yellow jackets/hornets are really getting bad here in NE PA today (at my house anyway!) We always just use the long distance spray & knock the nests down, like most others have said. HOWEVER...last season we noticed them hovering constantly around the corner of some of our copper roofing. We couldn't see a nest but did spray every week. Well fast forward to early fall - I go in my walk-in closet one evening & see what looks like a wet spot on the ceiling. Curious me, stands on a chair & pokes at the wet spot. What happened next is seriously like something out of a horror movie - a huge hornet's nest falls through the ceiling & get's stuck halfway (it was wider in the middle than the ends) - and tons, and I mean tons of hornets come swarming out!!! I got off the chair FAST and slammed the door shut. There were hundreds if not thousands of bees in there! I could hear them slamming themselves against the closet door all night long. Of course DH was out of town. Every piece of clothing I own was in that closet, and all my shoes - I had no idea how to get an outfit for work the next day! I called the exterminator but they were closed for the night. I stuffed towels by the closet door & just prayed they'd be gone in the morning (ok, seriously, where would they go??)
Next morning they were still all there. And angry. My DS11 put on his paintball mask & gear & ran in to grab me the 1st shirt, shoes & pants he could find for work! The exterminator came at 3pm & sprayed. What a mess. Dead hornets, spray & drywall dust all over everything in my closet. He wouldn't remove the nest either - he said that'a not part of his job, and that they won't ever go back to where an old nest was...so I shoved it back up into the ceiling & put contarctor's tape over the hole! I would have had to damage more drywall to get it out. It was the size of an elongated basketball. The exterminator said they chew the wood & drywall in the ceiling & spit it out to make the nest, that's what the wet spot was from, all their spittle. UGH!