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How to Get Rid of Spiders (10 Ways That Work)

You don’t have to suffer from arachnophobia (fear of spiders) to want to know how to get rid of spiders in the house.

There are a number of ways to do it; killing them, repelling them, or best of all, keeping them out of your house in the first place.

Some methods rely on synthetic chemicals and pesticides to kill or repel spiders, while others utilize all-natural compounds and botanical extracts. 

HOW TO GET RID OF SPIDERS

We’ll look at both methods and outline the best products in both categories.

We’ll also discuss keeping spiders out of your house. They don’t actually want to come inside, they’re just chasing their food sources, i.e., insects. If there aren’t any insects in your house for them to eat, there’s nothing to attract them.

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What Attracts Spiders in the First Place?

Spiders, arachnids, are predators, even the non-poisonous ones. They hunt, capture, kill, and eat insects. They also kill and eat each other. The most famous example of this is the black widow who kills and eats the male spider after they mate.

Mainly though, they eat insects. Researchers at Ohio State University in Marion, estimate there are between 11,000 to three million individual spiders per acre, including tiny ones you can barely see or that hide where you can’t see them.

Read Also: How to Keep Spiders Away (Top 4 Removal Tips)

These numbers mean there is incredible competition for food and spiders will follow their food wherever it goes. If insects enter your house, whether accidentally or on purpose, spiders will come right in after them.

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How to Identify if You Have a Spider Problem or Infestation

  • Spider Webs and Egg Sacs

The easiest way to identify the presence of spiders in the house is spider webs. They’ll usually be in corners up by the ceiling or down near the floor and baseboards. Not all spiders spin webs but all of them lay eggs and you might find their egg sacs.

Spider webs are the way many spiders capture flying insects. Their webs need to be anchored which is why corners so often have cobwebs in them. The conjunction of the two walls and a ceiling (or floor) creates the perfect anchor points for their web.

Many spiders will put their egg sacs on their web or in their hiding places if they’re not web builders. However, some, such as the wolf spider, will carry the egg sac on their back. If you see an egg sac, you’re going to have a spider infestation if you don’t stop it.

  • Spiders in the Night

Some spiders are nocturnal so the only time you’ll see them is if you turn on the lights at night. Others are so small they can hide in the cracks and crevices between the walls and the baseboards.

If you suspect you have spiders but you haven’t seen any in the daytime, set your clock to wake you up in the middle of the night then turn on the lights. Any spiders that have come out will be visible, especially if they run from the light.

Read Also: What are the best natural spider repellents?

  • Porcelain Basins

Porcelain bathtubs and sinks are another indicator of a spider presence in your house. If a spider ventures into a porcelain basin, they often can’t get back out again because it’s too smooth for them to get a grip on it.

Before you go to bed at night, or during the day when you’re not using the bathtub or sinks, put a stopper in them so any spider caught in there can’t escape down the drain.

  • Bite Marks

Finally, unexplained bite marks that spread or become infected might be spider bites from a black widow or brown recluse. Most bites from black widows aren’t serious, but about 80% of bites from brown recluse spiders are serious.

The bites of poisonous spiders are distinct from the bite marks left by bed bugs or mosquitoes. You’ll sustain multiple bites in a short period of time from bed bugs and mosquitoes, but only one or two from poisonous spiders.

If you see multiple bites on your or your family members, it’s probably not spiders. If you see only one or two bites, then you probably have a spider problem.

5 Natural Remedies to Quickly Get Rid of Spiders From Your House

  1. Cleaning

First and foremost, clean up the house. Use a broom to remove all the spiderwebs in the house. This will force the spiders to move around rebuilding their webs and expose them to your pest control efforts.

Use a vacuum cleaner to suck up any egg sacs in the house. Use the hose attachments when you’re vacuuming around the baseboards and other small cracks where spiders might have hidden their egg sacs.

When you finish vacuuming, remove the vacuum cleaner bag and dispose of it outside. Better yet, burn it so any egg sacs can’t hatch. After that, use white vinegar and water to wipe down all the areas spiders inhabit.

  1. Exclusion

Exclusion is the act of preventing the entrance of someone or something that is unwanted. Because spiders are so small, you’ll need to seal all the cracks and crevices in your house that allows spiders and insects to gain entrance.

Read Also: How Much Do Spider Exterminators Cost? 

The best way is to use silicone caulk to plug all the cracks and crevices around the windows, doors, foundations, plumbing and electrical intrusions, and openings in the soffits under the eaves all the way around the house.

The attic vents under the eaves can’t be plugged with silicone caulk because the house has to breathe. Instead, you’ll need to cover the vents with a 0.04-inch fine mesh. This is small enough to keep out nearly all insects, including spiders.

If your house has a pier-and-beam foundation, you’ll have to crawl under it and plug all the openings from the underside. And while you’re at it, don’t forget to screen in the chimney and other vents on the roof.

  1. Lights

Insects are attracted to lights, particularly white lights with blue and/or green in them. Yellow sodium lights on the other hand, fall outside their visual range and don’t attract them. If you turn on the outside lights at night, insects will swarm around them.

Wherever the insects are, the spiders will soon follow. There are two ways to alleviate the problem. First and easiest, turn off the outdoor lights. This saves electricity and keeps insects away. No insects, no spiders.

If turning the lights off is impractical or unsafe, remove the white lights and install yellow sodium vapor lights in their place. Since the yellow light doesn’t attract insects, spiders won’t follow them to your house.

  1. Diatomaceous Earth

Diatomaceous earth is composed of the fossilized shells of microscopic sea creatures called diatoms. In appearance, it looks like a very fine, white or brown powder. It is a well-known desiccant that dehydrates insects and spiders that come in contact with it.

The microscopic sharp edges also cut the hard outer carapace on insects and spiders, further dehydrating them. Most spiders are so small that any loss of moisture is fatal.

You’ll need a bulb duster to use it. Fill the duster three quarters of the way with diatomaceous earth then use it to puff small clouds of diatomaceous earth (DE) into the cracks and crevices spiders use to gain entrance to your house.

Go around the house from the outside, dusting every crack and crevice you can find. Pay special attention to plumbing and electrical intrusions, around windows and doors, and the tiny cracks between the house and the foundation. Do the same thing inside.

  1. Spider Traps

Glue boards, small sheets of cardboard with a layer of glue on one side, are an excellent method of removing spiders and monitoring where their population is the heaviest. Not only will they kill spiders, they’ll help you direct your DIY efforts to kill them.

You peel the film off the glue, fold the glue traps into cardboard boxes with the glue on the inside then place them where you suspect the spiders are the most numerous. Put out a glue trap every 10-15 feet if you don’t know where they are the heaviest.

When a spider walks across the glue, they’ll get stuck and die. Check the glue traps once a day and you’ll soon see where you’re catching the most spiders. This will tell you where to concentrate your spider control work.

3 Additional Remedies to Get Rid of Spiders From the House

Essential oils are natural juices and fluids extracted from specific plants, flowers, and trees. They’re called essential oils, not because they feel oily, but because they contain oil-soluble chemicals from the plant. Many of them are useful for pest control.

did you know get rid of spiders fact

They are natural spider repellents and many have actual insecticidal properties for killing insects and spiders. Here are three of the most useful.

  • Peppermint Essential Oil

Peppermint has a nice fresh, minty smell to it – to people. Insects, and the spiders that feed on them, are repelled by it. If they insist on proceeding through it, it can kill them. It’s also useful for treating itchy mosquito bites.

Mix 15-20 drops of peppermint oil with 32 ounces of water in a 32-ounce spray bottle. Shake well then spray it lightly over the areas where spiders and insects are entering your house.

Treat around the window sills, doors, under the sinks, around the toilets, tubs, refrigerator, washer, drier, and other appliances where spiders might be hiding. Spray up in the corners where they like to build their webs.

Essential oils aren’t known for having a long-term residue, so you’ll need to repeat the process about once a day.

  • Eucalyptus Oil

Eucalyptus oil is a standard in any “green” cleaning kit but it can also be used as an insecticide. The Ethiopian government uses it in areas with large mosquito populations to protect people, meaning it has repellent properties as well.

Mix about 15-20 drops of eucalyptus oil in a 32-ounce spray bottle and shake vigorously. Spray it on all the surfaces and cracks and crevices that insects and spiders try to use to gain entrance to your house. It has a nice citrus smell to it.

  • Tea Tree Oil

Tea tree oil is another “green” cleaning essential oil that also doubles as an insecticide and a topical insect repellent. It’s an anti-parasitic that can destroy or suppress the growth of multiple parasites such as fleas and lice.

Like most essential oils, mix 15-20 drops of tea tree oil with water in a 32-ounce spray bottle, then spray it around all the cracks and crevices that permit entrance to your house.

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Best Product Suggestions for Getting Rid of Spiders

A pesticide is any chemical or substance, natural or synthetic, that can kill, repel, or control pests. An insecticide is a pesticide that is specific to insects rather than plants or animals.

Read Also: Common House Spiders – Everything You Need To Know

Despite the many options available for killing spiders and getting rid of them quickly and efficiently, pesticides are still the best option by far. They work quickly and last for up to 90 days in many cases, far longer than all-natural products.

The most effective pesticides use pyrethroids as the active ingredient. Pyrethroids are synthetic versions of naturally occurring pyrethrins found in chrysanthemum flowers.

  1. Talstar Insecticide

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Talstar 3/4 Gallon Pros Pest Control Insecticide is a pyrethroid that uses Bifenthrin as the active ingredient. It was originally formulated for killing termites but its use has since been expanded to killing all sorts of insects and spiders.

It is ideal for use outside and will last for 90 days before you have to retreat the area. You should use a 4-gallon backpack sprayer for spraying it. Measure out 0.75 ounces of the concentrate for each gallon of water and mix vigorously for 2-3 minutes.

Spray the entire foundation of the house, up the side of the house 2-3 feet and about 10 feet out from the foundation. This gives you a wide band of pesticide insects and spiders will have to cross before they can come inside.

Also spray around the windows, doors, and soffits. Pay special attention to the plumbing, electrical, cable, and telephone intrusions. On an average house, you’ll need 2-3 gallons of mix. If you use less than that, you’re going too fast.

  1. Suspend SC Insecticide

Spraying inside the house, you should use Suspend SC, also a pyrethroid. It uses Deltamethrin as the active ingredient. Suspend is a long-time favorite of pest control professionals in the United States. One pint makes 64 gallons of mix.

You’ll need to use a 1-gallon pump sprayer, either a professional model or a less expensive one for DIY use.

It doesn’t have any odor, kills a broad range of insects and spiders, doesn’t leave a visible residue on walls or furniture, and lasts for up to 90 days before you have to retreat the area. For an average house, you’ll need about half-a-gallon.

Spray along all the baseboards, around the windows, doors, up in the corners where spiders build their webs, under sinks, behind all the appliances, behind the toilet, and (carefully) in all the closets.

Wrapping It Up

We haven’t covered all the possible ways to kill spiders or get rid of them, but these are the top 10 methods. We’re firm believers in a multi-layered approach to pest control, so we encourage you to combine two or more of these methods for better results.

Combining a pesticide, cleaning, and exclusion will give you the best results. Using one of the essential oils in the cleaning process will improve the outcome even more.

Go get ‘em!

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