If you have kids who are in and out of the house constantly, you're probably dealing with random flies coming in. This has been the BEST solution we've found- it has a light and a fan designed to attract bugs to land on the sticky part. I've been testing it for about a month and I don't even notice flies in our house anymore- and I've had to switch out the sticky circle part twice because there's been a bunch of bugs. LTKHome LTKSeasonal LTKFindsUnder50