I was moving around several trailers this last weekend and found that the wasps have taken a liking to building nests under the trailer tongues. Nine times I was stung #$^^##$@@! Went to hardware store and bought 10 cans of spray. I went wasp hunting. I have always checked the playground equipment so the grand kids don't get stung but have never really cared about nests other places well they started a war! I am very lucky to not be allergic.