Cockroaches in your dishwasher can be a frustrating and unsanitary problem. These pests are attracted to the warm, moist environment and food particles left behind, making the dishwasher an ideal hiding spot. Not only can they contaminate your dishes with bacteria, but their presence can also lead to unpleasant odors and health concerns.

Fortunately, there are effective methods on how to get rid of cockroaches in dishwasher to address this issue and prevent cockroaches from returning to your dishwasher.
What is a Cockroach?
Cockroaches are resilient insects that have existed for millions of years, adapting to various environments. They are often considered pests due to their ability to thrive in human habitats, feeding on organic matter and seeking warm, dark spaces for shelter. Cockroaches are typically between 1 to 2 inches long and come in various species, with the most common ones being the German cockroach, American cockroach, and Oriental cockroach.
These insects are known for their rapid reproduction and ability to spread allergens, bacteria, and pathogens, making them a significant concern in homes, especially in places like kitchens and dishwashers. Their survival skills, which include being able to live without food for weeks, contribute to their persistence and challenge in eradication.
Needed Materials
Baking Soda:
Baking soda is a common household product that has numerous uses, including being an effective cockroach repellent. Its abrasive and drying properties can damage the exoskeletons of cockroaches, leading to dehydration and death.
Borax:
Borax is another natural substance that is often used in cleaning and pest control. It is a mineral composed of sodium, boron, oxygen, and water and can be found in powder form. Borax attacks the nervous system of cockroaches, causing them to dehydrate and die.
Diatomaceous Earth:
Diatomaceous earth is a naturally occurring sedimentary rock composed of fossilized diatoms, a type of algae. It has abrasive properties that can damage the exoskeletons of cockroaches and absorb their body fluids, leading to death by dehydration.
Essential Oils:
Certain essential oils, such as peppermint, eucalyptus, and citronella oil, have strong scents that repel cockroaches. They also have antimicrobial properties that can help eliminate an existing infestation and prevent future ones.
8 Steps on How to Get Rid of Cockroaches in Dishwasher
Step 1: Clean the Dishwasher Thoroughly
Start by removing all the racks and detachable components from your dishwasher. Wash these items with warm, soapy water to remove any food particles or grease that may attract cockroaches. Next, inspect the dishwasher’s interior, including the corners, seals, and spray arms, for leftover debris or grime. Use a brush or sponge to scrub these areas thoroughly, focusing on hard-to-reach spots where cockroaches may hide.

Finally, wipe down the walls and door of the dishwasher with a cleaning solution, such as a mixture of vinegar and water, to sanitize the surfaces and eliminate odors. Cleaning the dishwasher meticulously ensures that it is less appealing to cockroaches and sets the foundation for effective pest control.
Step 2: Seal Any Entry Points
Cockroaches often enter the dishwasher through small cracks, gaps, or holes, including the areas around pipes and electrical connections. Inspect your dishwasher and the surrounding cabinetry for potential entry points. Use a silicone-based caulk or sealant to fill in any cracks or gaps that could provide access to cockroaches. Pay special attention to the dishwasher’s drain, as this is a common entry location for pests.
Additionally, check for any damage to the door gasket or seals and replace them if necessary to ensure a tight closure. Sealing these entry points helps to block access for cockroaches, making it more difficult for them to invade your dishwasher in the future.
Step 3: Eliminate Any Standing Water
Cockroaches are attracted to moisture, so it’s essential to eliminate any standing water or dampness in your dishwasher. Check the drain and any crevices or corners where water can accumulate and wipe them dry. Also, ensure that there are no leaks from the dishwasher or surrounding pipes that may be providing a water source for cockroaches.
If you notice any excess moisture, use a towel or paper towels to absorb it and dispose of them outside your home. By removing potential water sources, you are making your dishwasher less attractive to cockroaches.
Step 4: Use Baking Soda
Sprinkle baking soda liberally on the bottom of your empty dishwasher and let it sit for at least an hour. The abrasive properties of baking soda will help to damage the exoskeletons of any cockroaches that come into contact with it, leading to dehydration and eventual death.

After an hour, run a hot cycle in your dishwasher to remove the baking soda and any dead pests. You can also add a cup of white vinegar to the dishwasher during the cycle to help disinfect and eliminate any odors.
Step 5: Sprinkle Borax
Similar to baking soda, sprinkle borax on the bottom of your empty dishwasher and let it sit for at least an hour. The powder will stick to cockroaches as they move around, causing them to ingest it while grooming themselves. Once ingested, borax attacks the nervous system, leading to death.
After an hour, run a hot cycle in your dishwasher to remove the borax and any dead pests. As a safety precaution, wear gloves when handling borax and make sure to thoroughly rinse off any residue before using the dishwasher again.
Step 6: Use Diatomaceous Earth
Sprinkle diatomaceous earth on the bottom of your empty dishwasher and let it sit for at least an hour. The abrasive properties of this natural substance will damage the exoskeletons of cockroaches, causing them to dehydrate and die.

After an hour, run a hot cycle in your dishwasher to remove the diatomaceous earth and any dead pests. As with borax, make sure to wear gloves when handling diatomaceous earth and thoroughly rinse off any residue before using the dishwasher again.
Step 7: Place Essential Oils
Soak cotton balls in essential oils such as peppermint, eucalyptus, or citronella and place them around the dishwasher’s interior. The strong scents of these oils repel cockroaches, making your dishwasher less appealing to them.
You can also mix a few drops of essential oil with water in a spray bottle and spritz it around the areas where cockroaches may enter the dishwasher. This will create a barrier that prevents pests from entering.
Step 8: Monitor for Future Infestations
After thoroughly cleaning and treating your dishwasher, monitor it regularly for any signs of future infestations. Check for droppings, eggs, or live cockroaches every few weeks, especially if you live in an area prone to cockroaches. If you notice any activity, repeat the steps above to eliminate them and prevent future infestations.
Following these steps on how to get rid of cockroaches in dishwasher will help get rid of cockroaches in your dishwasher and keep them from coming back. Remember to maintain good hygiene practices in your kitchen, such as regularly cleaning dishes and wiping down surfaces, to prevent attracting pests. If you continue to have issues with cockroaches in your dishwasher, it may be best to seek professional pest control services for a more thorough treatment.
Preventing Future Infestations: Keeping Your Dishwasher Roach-Free
While it may seem like a daunting task to keep cockroaches out of your dishwasher, there are simple steps you can take to prevent future infestations. These include:
- Regularly cleaning your dishwasher and keeping it free of food debris and moisture.
- Sealing any potential entry points with caulk or sealant.
- Using essential oils or natural pest repellents as a preventative measure.
- Practicing good hygiene in the kitchen and properly disposing of any food waste.
By following these measures, you can significantly reduce the likelihood of cockroaches invading your dishwasher again.
Frequently Asked Questions
Q1: How Often Should I Clean My Dishwasher to Prevent Cockroach Infestations?
A: It is recommended to deep clean your dishwasher every three months, in addition to regular maintenance and cleaning after each use. It is also important to monitor for any signs of infestations and take necessary steps to prevent them.
Q2: Can Cockroaches Survive in My Dishwasher?
A: Yes, cockroaches can survive in dishwashers as they are attracted to warm and moist environments. They can easily enter

through small cracks or gaps and feed on leftover food debris.
Q3: Are DIY Methods Effective in Getting Rid of Cockroaches in a Dishwasher?
A: While DIY methods may be effective, it’s important to thoroughly clean and treat the dishwasher and surrounding areas to get rid of all potential hiding spots. If you continue to have issues with cockroaches, it may be best to seek professional pest control services for a more comprehensive treatment.
Q4: How Can I Tell if My Dishwasher Has Cockroaches?
A: Signs of cockroach infestation in a dishwasher include droppings, eggs, or live insects. You may also notice a musty odor or see cockroaches scurrying around the interior of your dishwasher.
Conclusion
Cockroach infestations in dishwashers can be both unsanitary and unsettling, but with proper cleaning and preventive measures, you can effectively eliminate them and keep them from returning. By sealing entry points, removing food debris, and addressing moisture issues, you create an environment that is less hospitable to these pests. Utilizing natural remedies like baking soda, borax, and essential oils further strengthens your defense against cockroaches.
Finally, staying vigilant and conducting regular maintenance of your dishwasher will ensure long-term protection. If the infestation persists despite your efforts, consulting a professional pest control service can provide a more thorough solution to safeguard your home and appliances. Thanks for reading an article on how to get rid of cockroaches in dishwasher.
Professional Focus
Angela Ervin, a former interior designer turned blogger, specializes in kitchen design and renovations. Through her website, she blends her passion for cooking with design expertise, sharing practical and creative ideas. Known for balancing functionality and beauty, Angela’s insightful content has made her a trusted voice in home design and lifestyle.
About the Author
Angela Ervin, an experienced interior designer and blogger, combines her passion for kitchen renovations with storytelling. Living in Petersburg with her family, she enjoys cooking and testing her projects firsthand. Known for her humor and relatable style, Angela shares creative, functional design insights through her content, making her a trusted voice in home design.
Education History
University: Virginia Commonwealth University
Degree: Bachelor of Fine Arts (BFA) in Interior Design
- Angela’s education at VCU focused on mastering core interior design principles, including spatial planning, color theory, materials selection, and sustainable design practices.
- She gained hands-on experience through studio projects and collaborative design exercises, which honed her ability to create functional and aesthetically pleasing environments.
- Her coursework also emphasized problem-solving and practical applications of design, preparing her for real-world projects like her self-directed kitchen renovations.
- The program’s strong foundation in both technical skills and creative expression shaped Angela’s ability to seamlessly integrate form and function in her work.