Raid Fumigator creates a deep penetrating, fumigating fog that flushes bugs out from where they hide and kills them on contact. The dry fog has a fresh scent and leaves no messy residue. It fumigates the whole room with a dry, white cloud of fog that stays in the air during the 3-hour treatment, penetrating deep, filling cracks and crevices and going way under furniture and appliances to kill bugs where they hide.