turtle will tell you to use ben gay or something like that maybe absorbine jr but it stinks. some say skin so soft. i've never used it. probably 50 years ago i came off the st. francis river from fishing and an old river rat was at the landing. i was swatting at the gnats and cussing them and he said, "vanilla flavoring." i asked again and he said it was the only thing he'd found to keep them off. with it's sweet smell you would think it would attract them. the ole river rat knew what he was talking bout.