I live in South Louisiana where mosquitos are very prevalent. I've noticed the last few times I opened our deck box to take out our pool furniture cushions, there are hundreds of mosquitos in there that begin flying around once I start pulling the cushions out and disturbing them. Funny thing is that they are mainly in that one space. I don't have many in my yard or around the pool that bother us. Even if I keep the cushions and deck box dry, they still stay in there, I'm guessing due to it being dark, cool, and sometimes moist environment. Is there anything I can put or spray in there to help get rid of these?