but seriously I just found out about them about two months too late for them to be effective last year. They say that they should be put out in the very early spring and then replaced around mid summer (I think). Based upon what my children, I bought them each a supply, and myself I do think they worked. They are cheap enough and might work for you. I live across from a small lake and I swear this summer I was never bitten once but with my sour blood maybe it would be that way anyway. None the less it might be worth a try...worked for me.