EndZone is easy to locate and apply. I was careful not to place any above where food is prepared as instructed. I could not determine from the instructions the recommended coverage area per patch, but I tried to put several in the kitchen to test the indoor efficacy and several around the eating area on our deck to test it there, as well. So far we are still seeing living flies and no evidence of any carcasses indicating EndZone is working. Great idea and this will be a 5-star when flies start dying!