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A dishwasher can save time, water, and effort, but it is not designed to handle every item in your kitchen. High temperatures, strong detergents, powerful water jets, and repeated drying cycles can damage certain materials.
Knowing what should stay out of the dishwasher can help protect your cookware, prevent expensive replacements, and extend the life of everyday kitchen tools.
Here are eight common items that are generally better washed by hand.
1. Wooden Utensils and Cutting Boards
Wood and prolonged exposure to hot water do not mix well. Dishwasher cycles can cause wooden spoons, cutting boards, and similar items to absorb water, swell, crack, or warp.
Repeated exposure to heat can also dry the wood excessively and shorten its useful life.
Instead, wash wooden kitchenware by hand with warm water and mild dish soap. Avoid leaving it submerged for long periods, and allow it to dry thoroughly.
2. Cast-Iron Cookware
Traditional cast-iron skillets and Dutch ovens require special care. Dishwasher detergents and prolonged exposure to water can strip away the seasoning that gives cast iron its characteristic cooking surface.
Once that protective layer is damaged, the cookware can become more vulnerable to rust.
For most traditional cast-iron pieces, hand-washing with a small amount of mild soap and drying immediately is the safer approach. A thin layer of cooking oil can then help maintain the surface.
3. Sharp Kitchen Knives
Putting quality kitchen knives in the dishwasher may seem convenient, but it can gradually damage both the blade and the handle.
The combination of heat, detergent, and movement can dull sharp edges. Knives can also strike other utensils during the cycle, creating additional damage.
More importantly, reaching into a dishwasher containing exposed sharp blades creates an avoidable safety hazard.
Hand-washing knives carefully and drying them immediately is generally preferable.
4. Nonstick Cookware
Many nonstick pans are labeled dishwasher-safe, so the manufacturer’s instructions should always come first. However, frequent dishwasher cleaning can be harder on some nonstick coatings than gentle hand-washing.
Harsh detergents, high temperatures, and repeated cycles may contribute to premature wear.
If you want to maximize the lifespan of a nonstick pan, washing it gently by hand is often the better choice.