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8 kitchen items that should never be washed in dishwasher

8 kitchen items that should never be washed in dishwasher Illustrative photo (Freepik)
Author: Maria Kholina

Dishwasher is a convenient assistant for every housewife. Its use can significantly simplify life. However, it is important to avoid some mistakes when using it, according to the Eating Well website.

Sharp knives

Regular washing of knives in the dishwasher can actually shorten their service life.

Also, a knife, if improperly placed, can damage the dishwasher. Even if this does not happen, the high temperature quickly dulls the blade and makes its coating dull.

Wooden utensils

Processing wooden cutting boards, as well as other kitchen utensils and tools made of wood, requires more delicate handling - especially if their surface is lacquered.

Under the influence of hot water and steam, such coating will start to peel and eventually flake off. In addition, drying under the pressure of air leads to the appearance of cracks and unevenness.

Plastic containers

American experts recommend washing plastic containers by hand to limit the impact of potentially harmful chemicals.

This is explained by the fact that under the influence of high temperatures, harmful chemical substances can start to be released from them.

If you have plastic containers that can be washed in the dishwasher and do not contain bisphenol, be sure to place them as far away as possible from the dishwasher's heating element.

Cast iron cookware

Cast iron skillets are too valuable to be placed in the dishwasher.

Dishwasher detergents provoke the appearance of rust on cast iron and reduce the strength of the products.

Non-stick cookware

Most modern non-stick cookware labels indicate whether it can be washed in the dishwasher.

According to professionals, cookware with a non-stick coating loses its special coating over time when washed in the dishwasher at high temperatures.


Perhaps your grater won't be damaged by intensive cleaning in your dishwasher, but Parmesan residues won't be removed as well as if you washed it with a brush.

Save time and just wash them by hand.

Aluminum baking molds

Aluminum poorly reacts to the high temperature of the dishwasher, which can lead to a change in color.

Due to detergents and high temperatures on the surface of aluminum utensils, a black deposit is formed, which is then difficult to get rid of.


Much high-quality porcelain can only be washed by hand. The unique patterns on porcelain dishes from your grandmother's set will darken over time.

This prohibition does not apply to modern white porcelain dishes, which are suitable for everyday use.