+86 138 2765 6833
Home » News » Forged Knife Knowledge » Why You Should Never Put Your Kitchen Knives in a Dishwasher?

Why You Should Never Put Your Kitchen Knives in a Dishwasher?

Views: 286     Author: Vickey     Publish Time: 2023-11-28      Origin: Site


facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
whatsapp sharing button
sharethis sharing button
Why You Should Never Put Your Kitchen Knives in a Dishwasher?

Damage to the Blade

As you strive to achieve culinary mastery, it is important to pay attention to every detail, including the manner in which you manage your dependable kitchen instruments. Let's have a look at the reasons why putting your kitchen knives in a dishwasher is a wrong choice.

1.The dishwasher dilemma

However, despite the fact that they save time, dishwashers are extremely harsh on the blades of your knives. Knives endure a roller coaster of abuse within the metal cage. In spite of the fact that the high-pressure water jets may appear to be innocuous, they persistently pound your knives like an unyielding drum solo. The surface of the blade may undergo microscopic deformations as a result of this mechanical intervention.

2.Sharpness is damaged

These little, almost undetectable serrations, which are frequently referred to as micro-serrations, are an essential component of the sharpness of a knife. They are the ones who are responsible for the sharp edge that makes slicing through a tomato as easy as dancing the traditional ballroom dance. As a result of the dishwasher's mechanical commotion, these serrations become less noticeable. What is the end result? The blade of your knife becomes dull, and your culinary dexterity decreases as a result.

3.Deformation of edges and chipping

In addition, the tumultuous atmosphere brought up by the dishwasher is fertile ground for chipping and edge deformation. There is a high probability of a catastrophe occurring as a result of the knives rubbing against each other and the racks. Chipped blades pose a significant risk to workers in addition to being unsightly.

4.Matters with edge alignment

In addition, the edge alignment, which refers to the meticulous symmetry of the blade's edge, is at risk. The mechanical onslaught of the dishwasher can cause an uneven edge alignment, leading to dullness and reduced efficacy of your knife.

When you can treat your precious blades with the care that they deserve, there is no reason to put them in danger. You might be able to save time by using the dishwasher, but the cost of your knives and your ability to cook is much too extensive. For these devoted buddies in the kitchen, it is time to investigate alternatives to cleaning that are less destructive.

High Carbon Black Kitchen Knife Set

Damage to the Handle

Additionally, the blades of your kitchen knives, especially those superb knives, are not the only thing that they are. In this article, we will discuss the problem of handle damage and the reasons why the dishwasher is its silent adversary.

1.The dishwasher's heat and detergents

Dishwashers release a variety of powerful chemicals and high temperatures into the environment. These seemingly innocuous components have the potential to devastate the handles of knives. The elevated temperature has the potential to cause the handles to stretch, which results in a deformed grip that is uncomfortable. Furthermore, strong detergents assault the materials, removing their luster and leaving them dull and vulnerable to harm. This leaves the materials in a state of instability.

2.Effects on longevity, grip, and aesthetics

There is more to handling damage than just appearances. As a result, the compromised handle of your knife may affect the ergonomic grip, which is essential for safe and effective knife operation. A compromised handle can make holding the knife feel strange in your hand. Ugly cracks, discoloration, and a dull polish can ruin the pristine appearance of knives. This can be a problem from an aesthetic standpoint. As soon as the handle begins to split as a result of thermoplastic degradation, there is no going back. The longevity of the handle is at risk.

Retention of Edges and Dullness

Now that we've covered the basics, let's talk about one of the most important reasons why you should never put your kitchen knives in the dishwasher: dullness and edge retention.

1.Implications for cleaning dishwashers

Cleaning your knife blades in the dishwasher can be a very unpleasant process. When it comes to cleaning your knife, strong detergents and high-temperature water do not differentiate between food particles and the fine edge of your knife. As a consequence of this, the blade's micro-geometry would be considered impaired. Once this occurs, the highly polished edges that provide precision cutting will become rounded and less effective.

Abs Colorful Handle Kitchen Knife Set

2.Frequently re-blending

Using the dishwasher can diminish the sharpness of your knife, leading to the need for more frequent use of the sharpening stone. It is possible that the overall edge retention of your knife will be considerably impacted if you need to re-sharpen it frequently. Those high-quality knives that are made to last for a long time are very important to keep in mind.

3.Micro-geometry and wear resistance

The micro-geometry of the edge of your knife is a significant factor in determining how well it slices. The dishwasher's wear and tear decreases the knife's wear resistance. Simply put, it loses the capacity to maintain its sharpness over an extended period of time.

If you place a high value on your kitchen knife, it is abundantly evident that cleaning it in the dishwasher is the most formidable adversary of edge retention.

Safety Hazards

At this point, let's discuss one of the most important aspects of knife care: safety. Improperly handling knives that have been washed in the dishwasher poses a significant risk to the user's safety.

1.Hot knives

When removed from the dishwasher for the first time, blades can become quite hot. It is possible that the high-temperature water and steam will transform your knife, which was previously innocuous, into a potential burn threat. Taking the blade by accident because you thought it was cool to the touch is not something you want to do.

2.Damp and unsteady

Frequent machine-washing leaves knives moist. This dampness has the potential to make the handle slippery, which puts your hold in jeopardy. Having an inappropriate hold can lead to unintended mishaps and slips.

Grey Hollow Handle Kitchen Knife Set

3.Unintentional cuts

Inadequately cleaned knives can leave food residue on the blade, which is not only an unacceptable appearance but also a potential threat to the user's safety. The residue can compromise your ability to manage the cutting process, potentially resulting in inadvertent cuts.

Rust and Corrosion

Let's get into the science behind why dishwashers and knife steel are not compatible with one another. A dishwasher contains high temperatures, harsh detergents, and a moisture-saturated atmosphere. This combination has the potential to cause problems for the steel of your knife.


The harsh detergents have the potential to remove the passivation coating that is present on the stainless steel of your knife. This layer of protection prevents corrosion from occurring. If you do not have it, you can find that your blades have unattractive stains on them.


Pitting may occur as a result of the hot and humid atmosphere that exists within the dishwasher. This is the beginning of the formation of small, localized corrosion patches. The craters on your knife resemble those found on the moon.

3.Rust formation

If you do not completely dry your knives after washing them in the dishwasher, rust may develop. Rust is the adversary of every blade, and it has the potential to reduce the effectiveness of your knife as well as the safety it provides.

Final Thoughts

In order to protect the value of your kitchen knives, it is essential that you refrain from using the dishwasher until they have reached their full potential. The fundamental causes have been investigated, including the deterioration of the blade, the damage to the handle, corrosion, bluntness, and safety risks.

Performing the necessary maintenance ensures that your blades remain sharp and your handles remain undamaged. Handwash with a gentle soap and water that is lukewarm, dry as soon as possible, and preserve correctly.

Content Menu


Goldsun Kitchen Knife Manufacturer established in 1989 and focuses on the kitchen knife production, design & development, quality control and working process improvement. Corporate with the world famous and high-end brands, provide OEM and ODM service.


Product Category

Quick Links

Contact Us

Copyright© 2023 Guangdong Jinhui knife and Scissors Incorporated Company Ltd.