Spiders eat insects and therefore are helpful at keeping the insect population down in and around your house. Unfortunately, some types of spiders are poisonous, even deadly, to humans and animals. If you are looking to rid your house of spiders, some natural home remedies to kill spiders are safe to use and proven effective.
Diatomaceous earth occurs naturally, made from water plant fossils ground into a powdery consistency. This powder sticks to anything that is moist. To use Diatomaceous earth to kill spiders, sprinkle it in the areas where spiders lurk. When a spider walks on Diatomaceous earth, the tiny razor sharp fossils actually penetrate its exoskeleton, causing it to become dehydrated and die. When using it, wear a protective mask to prevent inhaling it as it can cause damage to your lungs. Diatomaceous earth kills spiders naturally it does not repel spiders. You can find it in the garden section at most home improvement stores.
Essential oils such as peppermint, tea tree, citronella, rose, lavender, citrus, and eucalyptus are all safe to use in and around your home. Dilute one of these essential oils with water in an opaque spray bottle. When you see a spider, spray it with the mixture. This will stop the spider in its tracks long enough for you to squash it. You can then spray this around the house in areas where you notice spiders. Spiders do not like the taste of the essential oils and therefore will not come back to the area.
Place glue boards or sticky traps in areas where you see spiders as well as inconspicuous places such as behind furniture, in the midst of clutter, and along wall-floor junctures. The spiders will wander onto a glue board, stick to it, and eventually die. Placing these glue boards throughout your house can also help reveal areas where spiders are abundant.