Harris Egg Kill and Resistant Bed Bug Killer 32 ounce with trigger sprayer is formulated to kill even the toughest (resistant) bed bugs and their eggs. The adjustable trigger spray nozzle allows for a fan pattern or stream spray as a crack & crevice application. For use indoors on mattresses, box springs, bed rails, as a spot treatment. The spray becomes active, odorless and non-staining after it has dried. Always follow label directions and keep out of reach of children.