With the current dengue problem going around, I would like to share a secret with my fellow expats. One sure way to repel mosquitoes is with GARLIC. Eat one to two fresh cloves of RAW garlic daily and you will not be bitten by mosquitoes. I know I am going to catch a lot of flack about this suggestion, but it does work. Years ago I used to go camping in upstate New York and each morning my camping buddies used to wake up with red welts all over from the agressive mountain mosquitoes. I on the other hand never got bitten, not even once! Yes some people will make a "stink" about the smell, but hey do you prefer to repel a few GARLIC haters or dengue laden insects. Good luck.