Finding a spider dangling above your bed at 2 a.m. is enough to make anyone lose sleep — sometimes literally. While most household spiders are harmless and even beneficial (a single spider eats roughly 2,000 insects per year), that fact rarely provides comfort when they keep showing up in your bathroom, basement, or closet. If you want to know how to get rid of spiders without coating your home in chemical pesticides, the natural approach works surprisingly well when you address the real reasons they moved in.
Why Spiders Are in Your House
Spiders do not invade homes for the warmth or the company. They follow their food source: other insects. A house with a spider problem almost always has a broader bug problem first. Flies, gnats, ants, moths, and mosquitoes draw spiders indoors, and until you reduce that prey population, new spiders will keep replacing the ones you remove.
Entry points matter just as much. Gaps under doors, torn window screens, cracks in the foundation, and openings around utility pipes give spiders easy access. Most common household species — cobweb spiders, cellar spiders, and jumping spiders — need an opening barely 1/16 of an inch wide to squeeze through.
Natural Repellents That Actually Work
Several natural substances repel spiders effectively by overwhelming their chemical-sensing organs on their legs. These are not folk remedies — entomological research supports their effectiveness.
- Peppermint oil: Mix 15-20 drops of pure peppermint essential oil with 1 cup of water in a spray bottle. Apply to window frames, door thresholds, and corners where webs appear. Reapply every 1-2 weeks. A 4-ounce bottle of peppermint oil costs $8-$12 and lasts months
- White vinegar: A 50/50 vinegar-water spray works as both a repellent and a contact killer. The acetic acid is harmful to spiders on contact. Avoid spraying on natural stone or hardwood surfaces
- Diatomaceous earth (food grade): Dust a thin layer along baseboards, behind appliances, and in crawl spaces. The microscopic sharp edges damage spider exoskeletons, causing dehydration within 24-48 hours. A 10-pound bag runs $15-$20
- Cedar chips or cedar oil: Place cedar sachets in closets, drawers, and storage areas. Cedar contains natural compounds that repel spiders and many other insects
- Eucalyptus sprigs: Hang fresh or dried eucalyptus near windows and entry points. The strong scent deters spiders for 2-3 weeks before needing replacement
Seal Entry Points Systematically
Repellents work on spiders already inside, but sealing entry points stops reinforcements from arriving. Spend an afternoon doing a perimeter check of your home with a tube of silicone caulk ($5-$8) and a can of expanding foam ($6-$10).
Focus on these common entry points:
- Gaps around window and door frames — caulk anything wider than a hairline crack
- Holes where plumbing, electrical, and HVAC lines enter the house — fill with expanding foam
- Dryer vents, exhaust fans, and attic vents — install fine mesh screens (1/16-inch or smaller)
- Garage door weatherstripping — replace worn or compressed seals
- Foundation cracks — caulk on the exterior side
This single effort often reduces indoor spider sightings by 50-70% within a few weeks and also cuts down on ants, roaches, and other insect intruders.
Reduce the Prey That Attracts Them
Eliminating other insects removes spiders’ reason to stay. Switch outdoor lighting near doors to yellow or amber LED bulbs, which attract far fewer flying insects than standard white bulbs. Keep kitchen counters free of crumbs, store fruit in the refrigerator, and take garbage out nightly during warm months.
Indoor plants can harbor fungus gnats and other small insects that become spider food. If you notice webs forming near houseplants, let the soil dry out between waterings and add a thin layer of sand on top to discourage gnat larvae.
Web Removal and Ongoing Maintenance
Regular web removal discourages spiders from settling in. Use an extendable duster or vacuum with a hose attachment to clear webs weekly in problem areas — corners, ceiling edges, window frames, and behind furniture. Destroying a web forces the spider to expend significant energy rebuilding, and many species will relocate after losing their web two or three times.
Vacuuming is actually one of the most effective ways to learn how to get rid of spiders without chemicals. A quick pass along baseboards, under furniture, and in closet corners once a week removes both spiders and their egg sacs. Each egg sac can contain 100-300 baby spiders, so catching them before they hatch prevents population explosions.
Dealing With Dangerous Species
Most spiders in your home are harmless, but two species in the US warrant caution: the brown recluse and the black widow. Brown recluses have a violin-shaped marking on their back and prefer dark, undisturbed spaces like boxes, shoes, and closets. Black widows are glossy black with the distinctive red hourglass marking and favor garages, sheds, and woodpiles.
If you identify either species in your home, natural methods alone may not provide adequate control. Contact a licensed pest control professional for targeted treatment. Professional spider treatments typically cost $150-$300 for an initial visit with follow-up treatments every 2-3 months at $75-$150 each.
Outdoor Prevention to Keep Spiders Away
What happens outside your home directly affects what comes inside. Pull mulch, leaf piles, and woodpiles at least 3 feet away from your foundation — these are prime spider habitat. Trim shrubs and tree branches so they do not touch the house, eliminating bridge access to walls and rooflines.
Spray your foundation perimeter with the peppermint oil solution or apply a 3-inch band of diatomaceous earth along the base of exterior walls. For persistent problems, plant lavender, mint, or lemongrass near entry points — all three are natural spider deterrents that also look good in foundation beds.
Consistent application of these how to get rid of spiders strategies typically reduces indoor populations to near zero within 2-4 weeks. The key is addressing both the spiders you see and the conditions that invited them in the first place.
