The Lowe’s in Edmond had these on clearance for $4. I figured I’d try one out, filled the bag in 24 hoursFlys can smell a mile away, so you would have to get rid of flys a mile around you in all directions. Best thing I found to trap flys is called fly bags, open it up put water in it, the bait bag will dissolve and makes the foulest smelling crap, but it works flys get in it, but can't get out, once its full close it up and trash it.