The most effective way to eliminate box elder bugs indoors is to use a vacuum cleaner. To avoid an indoor infestation, seal all openings in screens, windows and doors, and apply a residual insecticide, such as Defense SC or Cyper WP, around the perimeter of the house.
To eliminate box elder bugs without releasing their stench, use a vacuum cleaner and destroy or dispose of the bag.
Box elder bugs enter houses when temperatures drop in fall. To avoid infestation in areas where box elder bugs are common, apply a pest control product indoors around door and window casings and outside around the home's foundation, following all manufacturer instructions.