What Is the Best Spider Killer Spray?

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No pesticide spray is recommended to control or kill spiders. Biologically they are not very vulnerable to chemical insecticides because they aren't true insects; they're arachnids. Spraying isn't effective unless one makes a direct hit on the spider.

Since they walk on long legs, insecticide residue on the surface only touches their feet, but spiders lack a circulatory system that will take the insecticide to the internal organs to cause a quick death. The most effective spider control involves swatting it with a newspaper, a shoe or some other weapon. It's also helpful to remove their prey, such as other insects, from the environment.