i have 1 of the screened bottom boards with the SHB tray trap. does anyone put a screen in the plastic tray? i have a lot of dead bees in the oil & only a few beetles. i think the screen would keep the bees out of the oil & allow the beetles to fall thru. i do not think i'm over-run with beetles & i'm trying to keep it that way. i guess the bees are there trying to find their way back into the hive.......