OK summertime is here, got the smoker going last weekend and the flies are relentless. Tried every thing, sprays, the little green incense thing, citralilla candle, every gave the bag of water with the penny in it a try. My flies could care less, they eat me and the food anyways...lol...so seen this commercial for "Shooaway" https://www.shooawayusa.com/ haven't decided to get it yet. The idea of a helicopter on my table isn't real appealing, especially with seven cats...lol..(I have an outdoor cat fence so the furballs stay outside alot) and cats LOVE spinning things, but it did give me an idea for an experiment. Ordered some small mirror discoball xmas ornments (stop laughing) they were only 5 bucks for a dozen of them. Now my line of thinking is, if it's the light distrotion that keeps the flies away then hanging these around the patio, maybe a few from the umbrella may keep little buggers away. Should be here later this week and will give them a try next weekend, will keep you'll posted.