Your Zevo Flying Insect Trap will draw in all flies, gnats, and fruit flies, with virtually zero effort from you, given a little careful placement and thinking, Ellie. Be sure your Trap is in an outlet located near an exit or entrance way. Kitchens, bathrooms, and garbage areas are places to consider, too. Wherever you put your Trap, make sure it's not blocked by anything, and that the other lights in the room are dimmed. Let that blue and UV light shine brightly. Need more help? We're here Mondays through Fridays, from 9 AM to 6 PM, EST. Our number is 1 (800) 374-9429.