Many people place sharp knives in the dishwasher, but kitchen experts warn this common practice can dull blades and pose safety risks. According to Appliance City, the safest place for sharp knives is not in the dishwasher at all.
The UK kitchen knife market is worth approximately £150 million to £200 million, with 3.5 million to 5 million knives and knife blocks sold annually. With such investment, proper care is essential to maintain performance and longevity.
Why Dishwashers Damage Knives
Appliance City explains: "You might be wondering where your sharp knives should go in your dishwasher. The truth is that they should be completely avoided when it comes to loading your dishwasher." The company emphasizes that knives collect bacteria and require proper cleaning for food safety: "Do not soak your blades, but rather handwash them straight after use."
Tableware experts Villeroy & Boch agree, noting that dishwasher detergents contain salts that corrode blades. "Over time, repeated dishwasher use can cause knives to become blunt. In the worst case scenario, they may even rust and become unusable." The company warns that even if damage isn't immediately visible, repeated wash cycles gradually dull knives and diminish their appearance.
Safety Risks of Dishwasher Knife Placement
Sharp knives in the dishwasher can be dangerous to the user. Appliance City advises: "Never point them upwards in the silverware basket, as this can lead to serious injury. It is always best to handwash your knives for safety and hygiene."
Exceptions and Best Practices
While high-quality knives—such as steak, meat, bread, and serving knives—should never go in the dishwasher, some simple kitchen, dinner, and ceramic knives may be dishwasher-safe if handled carefully. Villeroy & Boch recommends arranging knives so they do not touch other cutlery or crockery, and placing them in the cutlery basket with blades facing down to avoid injury.
Ultimately, handwashing with mild detergent and drying immediately is the best way to preserve knife sharpness and ensure safety.
