Jeanie - knats, joy oh joy. I was talking of mosquitoes but I can honestly say as often as they bother me flying all about me, I've probably only had a couple of bites this year and little to no reaction to them. They seem to stick their stinger in and immediately pull back out. I guess they don't like my blood type or something. Hornets are the the worst for me. I seem to be a bee magnet, particularly the last half of Aug (now) to mid Sept when they are dozier. If I join my husband on the patio after dinner he could have been out there for ages and within 10-15 mins of me joining him, there are several bees buzzing about and all about me. If they are in the garden they gravitate to me. I can be watering and look down and 3 could be on my tummy and I freak out and run for the house. One time living about 45 miles south of here, I was working in the garden and black wasps were buzzing around and next thing I knew I looked up and a bunch of them were headed for me and I ran to the kitchen door and several actually hit the glass on the door as it slammed shut behind me. I don't get reactions other than the expected EXTREME (and I do mean extreme for me) pain and an irritated spot but no allergic type reaction. I have to take Reactine every day like a 24 hr Benadryl anyway so I can eat certain foods. Yesterday, we were going about the garden with company and I had run into the house once and they finished up without me. Then I joined them on the patio and sure enough, I had to move us all inside, I couldn't stay out. She said she was somewhere for a corn roast and they had Plastic bags hung up with pennies and water and no bees of any type. Might work for your gnats. We discontinued our penny here and I might have trouble finding any Canadian ones! I do have fake hornet nests we forgot to hang this year and they work not bad. Good luck with the gnats. I don't envy you the Prednisone. I was on it for my Crohn's Disease from May to Sept one year 8 a day and then weaned off around the time I had to have surgery. Not a nice drug! Hang in there. Lin