Vitamin B1 from your local discount health food store might do it for you. You don't smoke it, you swallow it. Apparently Kiwis swear by it. I used it in Ghana. I don't know if it worked but I only got bitten once AFAIK in the four weeks I was there. I don't know how it works. It may have something to do with BO. In any case, it's good for you.