When applied directly, the insect suffocates. Orange Guard is a water-based insecticide. It can be used for aphids, ants, mealybugs, gnats, ants, silverfish, roaches, fleas.
Exposure shortens the life of the repellency.
Orange Guard repels best in cracks and crevices and works when the surface is absorbent and saturated. Try to find source of infestation and re-apply Orange Guard. Check again in a few days. If they have returned treat again. Shelf life was independently tested at a university research lab.