**8 things you should never put in the dishwasher** (and why)

However, not everything belongs inside a dishwasher.

High temperatures, strong water pressure, and harsh detergents can permanently damage certain materials, shortening their lifespan or even making them unsafe to use.

Here are eight common household items that are better washed by hand.

1. Sharp Kitchen Knives

Although many dishwasher-safe knife sets exist, hand washing is generally the better option.

The combination of heat, detergent, and movement during the wash cycle can:

• Dull sharp edges
• Damage handles
• Increase the risk of blades knocking against other utensils

A quick wash with warm water and mild soap helps preserve both sharpness and appearance.

2. Cast Iron Cookware

Cast iron pans are famous for their natural seasoning—a protective layer built over time through cooking.

Dishwasher detergents can strip away this seasoning, leaving the surface vulnerable to rust.

Instead:

• Wash with warm water.
• Use a soft brush if necessary.
• Dry immediately.
• Apply a thin coat of cooking oil afterward.
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