I work in a business that serves drinks mostly sweet so we have to have certain things left out on counters. Flies have started gathering now that summer is coming and it seems like for every 1 I kill 3 more show up and its annoying. We thought about fly strips but tat can’t be done out in the open, were not suppose to use chemicals because of the food so we’ve hit a wall. Any suggestions would be greatly appreciated and tried. Thanks!