Ok call me crazy but I figured out that when we keep our room air conditioned,the flees/Mosquitos seem to leave me alone. However outdoors is another story. What ever they are,they love me too! I have found tho if I am really faithful to use my OFF the bites are kept to a minimum! The last few times I carry it with me especially right after the rain or in the evening! Only had one or two bites! Oh ya and I always have antihistamines.