Will Bleach Kill Spider Eggs: The Ultimate Answer

Spider eggs can be found in various areas of our homes such as corners, crevices, and hidden spaces. These eggs can hatch into hundreds of spiderlings, which can be quite alarming, especially for people who have arachnophobia. Many people have asked whether bleach can kill spider eggs. In this article, we will explore the answer to this question.

What is Bleach?

Bleach is a chemical compound that is commonly used for disinfecting, whitening, and cleaning. It is highly effective in killing bacteria, viruses, and other microorganisms that can cause health problems. It is also a potent stain remover and can be used for laundry, toilets, and surfaces that need cleaning. Bleach is available in different forms, including powdered, liquid, and gel.

Spider Eggs

Spider eggs are small, round white balls that feel rubbery to the touch. Female spiders lay hundreds of eggs in a protective sac, which can be made from silk or other materials. These sacs can be found in dark, undisturbed areas around our homes. After several days to weeks, the eggs hatch into spiderlings, which scatter in different directions.

The Effect of Bleach on Spider Eggs

Based on several studies conducted, bleach has been found to be effective in killing spider eggs. The active ingredient in bleach, sodium hypochlorite, can destroy the protein in the spider’s egg, thereby preventing it from hatching. However, the concentration of bleach needed to kill spider eggs may differ depending on the type of spider species.

Safety Precautions When Using Bleach

Bleach is a toxic chemical compound that can be harmful to humans and pets when not used correctly. Therefore, it is essential to take the necessary precautions when using bleach to kill spider eggs. Below are some safety measures to consider:

  • Wear protective gear such as gloves and goggles when handling bleach
  • Ensure that the area you want to clean is well ventilated to prevent inhaling toxic fumes
  • Dilute bleach using the recommended dosage to avoid skin irritation and damage to surfaces
  • Never mix bleach with other cleaning agents as it can cause a chemical reaction and release toxic fumes
  • Store bleach in a cool, dry place, away from children and pets

Alternatives to Bleach for Killing Spider Eggs

In case you don’t want to use bleach, there are other effective ways of killing spider eggs. Below are some alternatives:

  • Vinegar- Vinegar is a natural disinfectant that can kill spider eggs. Mix vinegar with water and spray the mixture on the affected areas.
  • Essential oils- Certain essential oils such as tea tree and peppermint oil have insecticidal properties and can kill spider eggs. Mix a few drops of essential oil with water and spray the mixture on the affected areas.
  • Boiling water- Pouring boiling water on spider egg sacs can kill spider eggs by denaturing the protein found in the eggs.
  • Spider traps- Using spider traps is an excellent way of capturing spiders and preventing them from laying eggs. You can purchase spider traps at your local store or online.


Bleach has been found to be effective in killing spider eggs due to its active ingredient, sodium hypochlorite, which can denature the protein in the spider’s egg. However, it is essential to take the necessary precautions when using bleach, as it can be toxic to humans and pets. If you don’t want to use bleach, certain alternatives such as vinegar, essential oils, boiling water, and spider traps can be used to kill spider eggs.

Frequently Asked Questions

Below are some frequently asked questions related to the topic:

Q: Can bleach kill all spider eggs?

A: Not all spider eggs are affected by bleach. Some spider species may have eggs with a protective layer that cannot be easily destroyed by bleach.

Q: Will bleach kill other insects and pests?

A: Yes, bleach is effective in killing a wide range of insects and pests such as ants, cockroaches, and mosquitoes.

Q: Do spiders lay their eggs in the same location every time?

A: No, spiders may lay their eggs in different locations depending on the species and availability of prey.

Q: How long does it take for spider eggs to hatch?

A: It takes approximately two to four weeks for spider eggs to hatch.

Q: Can I wash spider egg sacs away with water?

A: It is not advisable to wash spider egg sacs with water as this can cause the eggs to disperse, increasing the risk of spiderlings hatching and spreading.


1. Spider Eggs and Egg Uses: Explained. (2021). Retrieved 10 June 2021, from https://pestcontrolzone.com/spider-eggs/

2. The Ultimate Guide to Spider Egg Sacs. (2020). Retrieved 10 June 2021, from https://www.thespruce.com/spider-egg-sacs-4125454

3. The 10 Best Natural Spider Repellents. (2020) Retrieved 10 June 2021, from https://www.treehugger.com/natural-spider-repellents-4868657

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