Unlike the other posters who have had problems with "live" bees in their siding and walls, we believe we have a bunch of dead bees in our exterior wall by the back mud room. There has been a rotten smell in that area for many months now (almost like something died in there), and the roof above that area is darker than the rest of the roof. My husband has tried looking in the attic above and crawl space below, to no avail. Should we contact an exterminator or beekeeper to help us? I'm afraid we'll have to pay to have the wall ripped apart and then replaced. We had this once before underneath a corner of our living room. Found the inactive nest in a basement storage closet -- took hours to get it cleaned up and did it smell! Help!! And thanks for any tips.