This video shows the process I went through to get rid of hornets in a really difficult to reach area. I took the video a week ago and there hasn’t been any activity around the site since so I know that I got rid of all of them. Good luck with your projects. I also hear that if you have good access to the nest you can wait until night time and take a garbage bag and quickly put the back over the next and close the top of the bag and knot the bag. Once you do this you will hear a lot of buzzing in the bag… make sure you don’t drop it… I would double bag it and then put it in the freezer overnight to kill them.