First, apply 100% deet all over your face, ears, neck, hair and hat. Next, seal yourself off with clothes you can sacrifice over the course of a season. Long pants,socks, shoes, long sleeve shirt with tight fitting collar and cuffs. Spray these clothes with an 18 to 20% deet product. Now, go and wash your hands thoroughly so you don't get any of this nasty crap on your lines. Next light cigar. Now, go fishing. With this arrangement, you are a toxic mess, but all you sacrifice to the hellish things are your hands, and you can blow cigar smoke over 'em. This arrangement has defeated everything from no see ums on the Essex to sandflies in NZ to backcountry mosquitoes in Wyoming. And you don't run the risk of ridicule when someone sees you in one of those crazy looking bug jackets. Although I've got one of those too, and it works. Still crazy looking, though.