I bought a new house in August that backs up to a small woods. I wasn't living there long before I discovered that there was a serious gnat infestation in the evenings. I couldn't even sit on the deck for 10 minutes without being bitten, The massive swarms of gnats looks like small storm clouds in my backyard. I tried spray, citronella bucket candles, ultrasonic repellent devices, hanging glue traps, and even a homemade vinegar and soap traps. Finally I went ahead and bought this electric trap since I was out of options. I was very happy when I heard zap zap zap shortly after putting it up. Ever since I put this out on the fence that runs along the woods the gnats have been almost non-existent.