Try to hang one up high and put one down low.
Hot Shot No Pest Strip
I got mine from Lowes. Search em, they work wonders but you don't wanna be breathing in the chemical they put off for to long. I have one in my closet that my setup is in. I only put it out at night when the lights are off and the fans are off. They work much better in areas without ventilation so that is my reasoning behind that.
You could also get some fly paper (cheap cheap) and you can put those all around the area, on the ground, mid level, up high.