Combat Crawling Insect Killer 600ml Combat Crawling Insect Killer Aerosal Spray has a special valve that provides accurate and direct spray at crawling insects that appears at hard to reach places/angles such as under the sink and narrow cracks. Its powerful formulation killing effect provides an instant kill for crawling insects while providing a long lasting effect. How to use: For immediate kill, spray directly at the insects. For continuous protection, spray suspected breeding areas and hiding places at a distance of about 20cm.