HomeCockroachCan Hot Water Kill Cockroaches? The Best Tips and Tricks

Can Hot Water Kill Cockroaches? The Best Tips and Tricks

Do you have a cockroach problem in your home?

Are you tired of using chemicals, traps, or baits that don’t work or are harmful to your health?

Do you wonder if there is a simple and natural way to get rid of these pests? If you answered yes to any of these questions, then this blog is for you.

In this blog, you will learn whether hot water can kill cockroaches and how to use it effectively.

Hot Water Kill Cockroaches
Can Hot Water Kill Cockroaches? The Best Tips and Tricks

Can Hot Water Kill Cockroaches?

Hot water can kill cockroaches, but only if they are fully submerged in it. The temperature of the water needs to be at least 51°C or higher to be effective. Boiling water, which is around 100°C, can kill cockroaches instantly on contact.

Hot water can also destroy cockroach eggs and the sticky substance that attaches them to surfaces.

Does hot water kill cockroach eggs?

Yes, hot water can kill cockroach eggs. Hot water can destroy the protective casing of the eggs and the sticky substance that attaches them to surfaces.

However, you need to make sure that the water is hot enough and that it reaches all the places where the eggs are hidden. Boiling water is the most effective, but you may also use steam or hot air to kill the eggs.

Hot Water Kill Cockroaches

How to kill Cockroaches with hot water?

To get rid of roaches in clothes, wash them at 55°C for 30-60 minutes. However, this depends on the type of clothes being washed. Some fabrics can be destroyed at high temperatures, so check the labels’ washing instructions.

Add a gentle detergent that helps kill roaches and their eggs once they break open from machine spins. Remember to check the detergent’s strength. Use it in small bits if it is too strong since extra hot water combined with strong detergents can easily destroy your clothes.

Washing your child’s backpack in hot water can kill roaches and their eggs. However, check the amount of heat the backpack can take on the washing instruction label. You may either deep and soak it in hot water for 30 minutes without detergent or use a washing machine.

Furthermore, you’ve probably wondered if cockroaches can survive in mattress or not? If so, please read this article: Do Roaches Lay Eggs in Mattresses?

Spraying bleach and hot water

Mixing hot water and bleach kills cockroaches by burning and dissolving their body cells. Bleach and hot water in equal proportions and douse them with it. As long as they are well soaked in the solution, they will die. Have them drowned in the solution if you want them dead instantly.

This can also be flushed down the kitchen sinks to kill roaches that hide in there. If you have an infestation in the drains, repeat this twice a day (morning and evening). Flushing 2 cups of bleach and the same amount of boiled water should be enough for the job.

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However, pure bleach should not be flushed down the drain since it can cause dangerous chemical reactions. This can also destroy the drainage pipes and lead to unwanted leakages. When pure bleach kills cockroaches in a drain, flush distilled water afterwards to reduce the reaction effects.  


Steam cleaners are designed to release boiled water in the form of steam. This comes with enough pressure to penetrate fabrics and kill any hiding roach. The pressure produced from a steamer is enough to harm roaches in carpets or any surface it is used on.

The pressurized steam can also help get rid of cockroach eggs, but it will not kill them. Soak roach eggs in vinegar and equal parts of hot water for 15 minutes or more if you want them dead. Steamers can help remove them on any surface they are glued on.

Steam cleaners can also remove cockroaches on patios and wooden floors. However, do not use a steamer on unfinished wooden floors. The head can damage unsealed wood, and using it frequently on those can reduce its durability.

Additionally, alcohol for roaches can be mixed with hot water equally. This reduces the negative effects of the solution on any surface. However, it should never e left to sock anywhere. Simply spray it directly on the roaches.

Can cockroaches drown in hot water?

Can cockroaches drown in hot water?

They do, but complete submersion is necessary, as it’s the heat that kills them, not just the water. Roaches cannot survive temperatures exceeding 50 degrees Celsius.

Hot water can also harm their open circulatory system and dissolve their bodies.

However, they can hold their breath for up to 30 minutes underwater by closing their spiracles, tiny breathing holes on their body.

They can even trap air and float on the water’s surface. So, drowning them in hot water may require prolonged submersion or the use of soap or detergent to break the surface tension.

Hot Water Kill Cockroaches


You have learned the answer to the question: can hot water kill cockroaches? You have also learned how to use hot water effectively to get rid of these pests, as well as the pros and cons of this method. You have discovered some tips and tricks to make this method work and avoid common mistakes.

We hope you found this blog useful and informative. If you want to learn more about cockroaches and how to deal with them, check out our other blogs from Pestweek. 

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