What kills spiders and spider eggs?
Spray them with bleach and water
One of the fastest ways to eliminate pests is bleach. This household compound is so toxic that it kills arachnids and insects in less than five minutes. Sprinkle spider eggs and spiderlings with a mixture of water and bleach.
Bug spray does kill spider eggs.
It's an effective solution to infestations and egg elimination when sprayed directly on the spiders and the egg sacs. It's best to use a fast-acting bug spray, like the Terro Stink Bug Killer Aerosol Spray, which kills spiders and their eggs in minutes.
In a spray bottle, mix white vinegar and water in equal parts. Then, get ready to spray whenever you see a spider—the acidic nature of the vinegar will kill the spider on contact.
We recommend using Web Out which is a spider spray that you can apply directly to the spider egg sac or spider web and its formula will break down the spider eggs and materials and kill spiders quickly. To apply, first shake the product well. If you bought the 32 oz. ready-to-use spray bottle, the application is easy.
Grab a spray bottle and mix white vinegar and water together. Go around the house and spray your mixture into all the little crevices around your home to deter spiders - it'll work a treat. Don't worry about the smell, that will disappear as soon as it dries.
When Do They Lay Eggs? The most direct answer is that spiders lay eggs throughout the whole year, depending on the species, but most will lay eggs in spring or fall.
Some spiders, like the wolf spider, carry their egg sacs on their body. After they hatch, the babies get a free ride on mom until they are old enough to feed themselves. It's best to hire a professional to remove spider eggs if you find them in your home.
Usually, vacuuming up spiders and their egg sacs is the easiest and most effective solution. You could also spray a pesticide directly onto spiders and egg sacs. Just make sure your product is oil-based, as water-based pesticides are ineffective against egg sacs.
The best way to remove a spider egg sac is to vacuum it up. You can simply use the hose attachment, vacuum the egg sac, and promptly dispose of it outside. However, be cautioned: if you disturb an egg sac with viable eggs, you may end up releasing hundreds of small spiders into your home.
“The brown widow spider egg sac is constructed with highly hydrophobic silks, so the water-based pesticide sprays were not very effective in penetrating the egg sac and impacting the eggs inside,” said Dong-Hwan Choe, one of the co-authors.
Does killing a spider attract more spiders?
The first thing is to ignore the impulse to get all Hulk-like when you see a spider and squish the little terror. Killing spiders will only attract other spiders; often, this makes way for nastier spiders. Some spiders are doing you a favor and are good to have in your home.
Mix one cup of apple cider, one cup pepper, one teaspoon of oil, and one teaspoon of liquid soap. Put it inside a spray bottle, then spray on areas where you see spiders.

House Spider Egg Sacs
Female common house spiders (Parasteatoda tepidariorum) deposit as many as 250 eggs into a sac of silk. These sacs are often brown in color and are flask-like in shape. Females produce up to 17 of these sacs during a lifetime, resulting in more than 4,000 eggs.
Spider eggs take up to 3 weeks to hatch and when they do, the babies will settle nearby before venturing further. In some species, spider babies will eat their mother for nourishment.
However, there are general guidelines, which include: Spider Eggs Sacs are typically small white or light-colored spheres that look similar to golf balls or grapes. These eggs are usually wrapped inside a silk sac to help incubate the offspring. The Size of Spider Egg Sacs is often smaller than a quarter.
Females of many species die after producing the last egg sac. Others provide care for the young for some period of time; these females live one or, at most, two years.
Myth: Spiders are most numerous in late summer.
Fact: Actually, August and September are the worst time of year for northern hemisphere spider collectors. A few large conspicuous spider species (including the larger orbweavers and the giant house spiders) are mature at that time, but not many other spiders are.
Many spiders lay their eggs inside a silk egg sac, which is usually hidden in a web, affixed to a surface, or carried by the female. Spiders may produce multiple egg sacs, each containing up to several hundred eggs.
Spiders and flies: Many of our readers have confirmed that dryer sheets will repel both spiders and flies. Keep a few extra sheets in clothes hampers and around the laundry area and you can kiss all those spiders goodbye.
It's easy to keep spiders away using natural products. These eight-legged creatures hate the smell of citrus fruits such as lemons and oranges. They also don't like peppermint oils, tea tree oils, eucalyptus, and vinegar. Using any of these around your home will keep spiders away.
What stops spiders coming in?
Spiders supposedly hate all citrus scents, so rub orange or lemon peel along skirting boards, window sills and bookshelves. Use lemon-scented cleaners and furniture polish, and burn citronella candles both inside and outside of your home.
Common places where spiders tend to nest and lay eggs in the house include: in and behind the closet, under the bed and sofa, under the kitchen sink, and in the garage. They also love humid areas like the bathroom and basement. Most spider species including black widows lay hundreds of eggs at once.
But lest you be tempted to "taste the rainbow," please hold back, as some spider eggs are known to be toxic, according to a study published in August 2017 in the Journal of Arachnology.
“Spiders are actually really good mothers, they take care of their babies,” says Miorelli. Because of this, you're likely to find a spider near its eggs. Many species will put their eggs in their web, while some carry them on their backs or even drag them along on a line of silk.
Peroxide won't kill the eggs, however, so you may want to combine this method with neem oil. Don't be so quick to groan at the idea of more bugs in the house.