How Do Fleas Kill On Contact

How Do Fleas Kill On Contact? Discover The Flea Killer

In this article, I will show you how do fleas kill on contact immediately inside and outside the house. You will also learn about home remedies for killing fleas on contact as well as flea-killing sprays for the home.

Here, you’ll learn about the risk involved with this instant flea killer and how to deal with it.

There are also two more options for killing fleas on contact. These are the most effective flea-killing sprays and home remedies to get rid of fleas on contact.

How Do Fleas Kill On Contact?

Fleas are killed by some household products and sprays when they come in contact with them. In a moment, you’ll learn about them.

For now, let us reveal a product that you might not be aware of: it is the most lethal flea killer. 

Let’s get to know more about it.

Rubbing Alcohol Kills Fleas On Contact

Fleas are killed by rubbing alcohol when they come in contact with it. Furthermore, it kills ticks, bedbugs, and plants pests such as mealybugs, aphids, whiteflies, and scale crawlers. 

How does rubbing alcohol work?

Isopropyl alcohol and water are the ingredients of rubbing alcohol. Pharmaceutical companies, hospitals, cleaners, and many others use it for disinfection, and cleaning rubber alcohol comes in two different varieties most of the time.

Rubber alcohol comes in two different varieties most of the time. Isopropyl alcohol and water are combined in different proportions to produce these variants.

One variant contains 70% isopropyl alcohol and 30% water. Using less than 30% water, it has 70% alcohol plus a small amount of isopropyl alcohol. 

Which variant kills fleas and other bugs when in contact with them? The best way to kill fleas and bugs is to rub alcohol with 70% isopropyl alcohol and 30% water.

How come?

As isopropyl alcohol levels approach 70%, rubbing alcohol is more effective for disinfecting and killing fleas. 

Isopropyl alcohol dissolves slowly in water and penetrates the flea shells by penetrating its 30% water content, which also contains denaturants and perfume oils.

When the percentage of isopropyl alcohol in rubbing alcohol is greater than 85%, its disinfecting power decreases significantly.

Rubber alcohol’s ability to kill bacteria and fleas is lowered by high concentrations of isopropyl alcohol. The high amount of isopropyl alcohol in rubbing alcohol is used by doctors to ease nausea after surgery. 

How does rubbing alcohol kill fleas and other bugs?

Rubber alcohol functions as a desiccant. By absorbing all the moisture in the fleas’ bodies, it dehydrates them. 

If fleas come into contact with rubbing alcohol, rubbing alcohol acts as a solvent. The fleas’ outer shell is dissolved and eaten away by it.

As soon as it breaks the flea’s exoskeleton, it begins to absorb the moisture inside its body. It is enough to kill most fleas when the exoskeleton is broken. 

Because rubbing alcohol contains so much water, it acts like a double-whammy for fleas.

By getting inside the flea’s body, rubbing alcohol slows down its evaporation and increases the amount of time that it is in contact with the flea’s organs. 

The flea’s body absorbs more moisture when it has more time to contact. This causes the fleas’ bodies to dry out from the inside, which leads to their deaths.

As with fleas, rubbing alcohol is effective against bed bugs, ticks, and bacteria.

How Do You Kill Fleas With Rubbing Alcohol?

Rubbing alcohol can be used to kill fleas on contact fairly easily. A spritz bottle is all you need. 

Pour rubbing alcohol into a spritz bottle and spray it on places like bed, carpet, furniture, wooden floors, and anywhere else you have noticed fleas. Where there is lush vegetation, fleas are most likely to be found in the yard, garden, or outdoors. 

Fleas breed in these areas and await the chance to latch onto a host, such as your pet dog or cat.

It would be best to spray rubbing alcohol on the thick vegetation of your yard and garden to kill hidden fleas. 

Rubber alcohol can be sprayed on plants without harming them. Your plants won’t be harmed by it. Plant pests like mealybugs and other damaging pests would be killed by it.

Some people recommend mixing rubbing alcohol with water before spraying.

This isn’t something we recommend. Adding water to rubbing alcohol will increase its water content and decrease its effectiveness.

If you are using 70% isopropyl and 30% water in your rubbing alcohol, we strongly recommend that you don’t mix water with it.

Do You Need To Use Rubbing Alcohol To Kill Fleas On Pets?

Rub alcohol should never be used to kill fleas on your pet dog or cat.

What’s the reason?

If pets ingest rub alcohol, they will experience vomiting, disorientation, respiratory disorders, and seizures. 

You should make sure that your pets aren’t exposed to rubbing alcohol for at least 24 hours after you spray it to kill in your home.

Rubber Alcohol Risks

After learning that rubbing alcohol kills fleas when it comes in contact with them, it’s time to learn its risks.

The main question that many of our readers email us with is whether or not they should use rubbing alcohol often?

NO, that’s the answer. In your home, you shouldn’t over-rely on rubbing alcohol to get rid of fleas and bugs. While rubbing alcohol may be a good disinfectant and flea killer, it can also be harmful if used repeatedly. 

It is possible to develop skin rash and itching from repeated exposure to rubbing alcohol.

Rubbish alcohol can irritate the nose and throat, cause headaches, and cause dizziness when inhaled. If you want to kill bugs and fleas in your house, you shouldn’t rely entirely on rubbing alcohol. 

Is there any alternative to rubbing alcohol that kills fleas on contact and quickly?

All of them are covered in the following section.

How To Get Rid Of Fleas On Contact With Home Remedies

Fleas can be killed by four household items you must have in your home right now.

#1 – Dish Soap

Fleas are trapped and killed by dish soap. Dish soap should be generously applied to a plate. Water should be poured over it.

Placing the plate in places where fleas have been observed is a good idea. The area around the bed, couch, carpet, pet bed and furniture are excellent choices for storing it.

The plates should be kept overnight in order to be most effective. Soap and water act as the glue that binds fleas to the solution. 

The dish soap in the mixture kills the fleas trapped inside. Keep a fresh mixture of dish soap and water every night for better results.

#2 – Homemade Flea Killer Spray

With household items and water, you can make a homemade flea killer spray.

Pour half a gallon of white vinegar or apple cider vinegar, a quarter of a gallon of water, and 200 ml of lemon juice into a bucket.

Stir the mixture thoroughly. Peppermint essential oil should be added to the mixture in 200 ml. Mix well.

The mixture should be poured into a spray bottle and sprayed on the flea-infested areas. Fleas are also drawn to the mixture when sprayed directly on them. 

Many bugs, including fleas, are repellent to peppermint essential oil because of its insecticidal properties. The smell of peppermint repels bed bugs, fleas, roaches, and many other pests that invade your home.

#3 – Mixture Of Baking Soda And Salt

Fleas can be killed by sprinkling baking soda and salt on soft furnishings like carpets, rugs, mattresses, and upholstery.

All you need to do is mix equal parts baking soda and salt and sprinkle the mixture. Wait 15-20 minutes for the mixture to settle. 

Vacuum slowly, making sure you don’t leave any spots where the mixture has been scattered. Flea dead bodies on surfaces can be removed by vacuuming. 

Do not dispose of the dust bag near your home to prevent live fleas from jumping off the bin and reentering your home.

#4 – Diatomaceous Earth

Besides diatomaceous earth, fleas and bugs can also be killed by it. Diatomaceous earth can be spread on areas where fleas have been spotted. 

After vacuuming, wipe down the surfaces. By penetrating the fleas’ exoskeleton, diatomaceous earth robs their bodies of moisture that supports life.

Check out our guide to home products that kill fleas for more options.

Sprays that kill fleas on contact for the home

Would you like some options for good flea killers that kill fleas on contact?

Here are a few recommendations that kill fleas on contact and immediately.

Adams Flea And Tick Home Spray

It’s an all-purpose flea killer spray that kills adult fleas, flea larvae, and even flea eggs.

Vet’s Best Flea And Tick Spray

This is an excellent flea spray for outdoor use. It contains clove oil and peppermint oil that kill fleas when they are in contact with it.

In addition to killing mosquitoes, it is an effective mosquito repellent. 

Advantage Flea, Tick and Bedbug Carpet and Upholstery Spot Spray

It kills fleas on carpets, furniture, and bed mattresses. The fleas and bugs will die on contact when you spray them on them.

Before using these sprays, make sure to read the precautions listed on the containers.


We have revealed How Do Fleas Kill On Contact in this guide. Rubbing alcohol does the trick.

In addition to learning why rubbing alcohol is an effective flea killer, you have also learned about the risks of repeated use.

In keeping with that, this guide also includes some alternatives. Right now you can kill fleas in your home and yard with these household items.

In addition, there are three sprays that kill fleas and other tiny biting insects on contact. Despite their small size, fleas can easily hide in your bed, leaving bite marks and robbing you of sleep.  

To know more, read about 6 Fleas Bed Signs You Can Easily Ignore

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