I read you can use skin so soft from Avon on them. I used this last year as well as this year, and so did my sister on her chickens. I just pour a little in my hands and then wipe the waddles, comb and ear lobes on their head. Then I put a little on their feet. I use very little and then finish up by just stroking them down their back as if I’m petting them. A little pat on the booty and I’m done. This seems to work very well keeping the gnats away. I do this when they go to roost.