While most spiders have non-poisonous bites and only attack when feeling threatened, very few people want these nuisances in their homes. If you deal with spiders on a daily basis, you may wish to implement practices that reduce the spider population living in and around your house. Many of the measures taken to get rid of spiders help prevent other insects from appearing in your home as well.
Since spiders prey on insects for food, reducing the insect population in and around your home will help cut down on the number of spiders you find. Eliminate or reduce the use of outdoor lights at night, since these lights attract insects. Alternatively, you can try changing the bulbs in your outdoor lights to yellow "bug light" bulbs. A barrier of insecticide, when applied to the outside foundation of your house, will also help prevent insects from entering your home, thereby giving spiders less reason to enter your home, as well.
Prevent spiders from ever coming into your home by making a few changes to the environment. Remove any excess debris from your yard or push it to the far edge, away from your home. Trim away shrubs, hedges and other outdoor plants, which spiders often use as hiding places. Caulk and treat any doors, windows, cracks and crevices along the walls of your home. Indoors, replace any cardboard boxes with plastic bins since cardboard tends to attract spiders. Keep your house clean and clutter-free to prevent spiders from having a place to hide.
Use spider traps in problematic areas, including basements, garages, bathrooms and kitchens. Insect glue boards trap spiders and insects on a sticky surface, exterminating them through starvation. The clean-up may make you cringe, but these traps effectively remove many of the spiders currently living in your home. Hide these boards under sinks and behind appliances. Other contraptions, such as plug-in ultrasonic devices, claim to repel spiders rather than trapping them, but these devices often produce mixed results.
Cleaners, Chemicals and Natural Repellents
Lemon oil naturally repels many species of spiders. Wipe down the surfaces and walls of your kitchen, bathroom or other problematic rooms with household cleaner containing lemon. Alternatively, follow this procedure using a standard household cleaner with a few drops of lemon oil manually added in. Several pesticides exist on the market that claim to repel spiders. Look for products that list cypermethrin, pyrethrin or deltamethrin on the bottle. Always use pesticides with caution.
When all else fails, resort to measures that physically remove spiders from your home. Upon seeing a spider, use a vacuum cleaner with strong suction and a hose attachment to remove it. Destroy any webs you find indoors using a broom or duster with a long handle attachment. Dust regularly to destroy any eggs. Use a water hose to destroy webs you find outside along the perimeter of your house.