I have seemed to notice a lot more wasps an nests this year at my house. Is anyone else noticing this? I have tried to remove the nests as best I can (many of them are in the peaks of the roof of my 2 story house). I have used a telescoping power washer wand to knock them down, but it seems like they keep coming back in the same spots. Is there a way to prevent the wasps from building new nests in the same spot?