What Items Are Not Dishwasher Safe?

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Gina Napsin
March 20, 2024
Home appliances
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In the quest for convenience and efficiency in the kitchen, the dishwasher stands as a modern marvel, sparing us from the tedium of handwashing dishes. Yet, amid the convenience, there lies a crucial caveat: not everything is dishwasher-safe. While this trusty appliance can handle a wide array of kitchenware, there are certain items that should never find their way into its steamy embrace.
In this guide, we'll unveil the mysteries of what items are not dishwasher safe. From delicate cookware to cherished heirlooms, understanding these restrictions ensures your kitchen treasures remain in pristine condition, and your dishwasher runs smoothly.

The Dishwasher's Effect on Different Materials

  • Plastic
Plastic containers and utensils are a common sight in many kitchens. However, subjecting them to the high temperatures and strong detergents of a dishwasher can cause them to warp, melt, or become discolored. It's best to hand wash plastic items to preserve their integrity.
  • Wood
Wooden utensils, cutting boards, and salad bowls should never be washed in a dishwasher. The hot water and steam can cause the wood to crack, warp, and lose its natural finish. Hand washing with mild soap is the way to go for wooden kitchenware.
  • Cast Iron
Cast iron skillets and pans are known for their durability, but dishwashers can strip away the seasoning that keeps them nonstick and rust-free. To maintain your cast iron cookware, wash it by hand, dry it thoroughly, and season it regularly.
  • Nonstick Cookware
The dishwasher's abrasive detergents and high water pressure can damage the nonstick coating on your pans and pots, rendering them less effective. Always hand wash nonstick cookware with a gentle sponge to ensure its longevity.

Delicate Glassware and Crystal

Avoid placing delicate glassware and crystal in your dishwasher. The powerful water jets and elevated temperatures can result in chipping, cloudiness, and a loss of their beautiful shine. To safeguard these exquisite pieces, opt for gentle hand washing. This careful approach ensures that your fine glassware and crystal remain dazzling and unblemished, preserving their elegance and charm for years to come.

Sharp Knives and Cutlery

Sharp knives and cutlery should be spared from the dishwasher's harsh environment. The abrasive action and high water pressure can lead to dull blades or, in extreme cases, chipping. To safeguard your investment in quality knives, hand wash them using a mild detergent, taking care to dry them promptly. This practice not only preserves the sharpness of your knives but also ensures their longevity and safe use.

Aluminum and Copper Cookware

Aluminum and copper cookware, while excellent conductors of heat, are vulnerable to damage in the dishwasher. The dishwasher's harsh conditions can cause discoloration and pitting on their surfaces. To preserve the appearance and performance of these prized pots and pans, it's best to hand wash them with a soft sponge. This ensures they remain in top-notch condition, ready to deliver exceptional culinary results.

Electrical Appliances

Electrical appliances such as blenders, food processors, and coffee grinders should never be submerged in water or subjected to the dishwasher's moisture and heat. To maintain their functionality and safety, adhere to the manufacturer's cleaning guidelines. Typically, this involves wiping the exterior with a damp cloth and taking care to avoid any contact with water inside the appliances. This practice ensures the longevity and reliability of your electrical kitchen tools.

The Importance of Reading Labels

Reading and adhering to manufacturer labels is crucial in the kitchen. These labels often indicate whether an item is safe for dishwasher use. Following these instructions is essential to prevent damage and maintain warranty coverage. Ignoring these guidelines can result in costly repairs or replacements, underscoring the significance of a simple yet effective practice—paying attention to the labels ensures the longevity and reliability of your kitchenware.

How to Hand Wash Delicate Items

Hand washing delicate items is a simple process. Start with a mild dish soap and warm water. Use a soft sponge to gently clean each item, taking care not to apply excessive pressure. Rinse thoroughly with clean, warm water to remove any soap residue. After rinsing, dry the items with a clean towel, ensuring they are completely dry before storage. This gentle approach maintains the integrity of delicate items while keeping them clean and ready for use.

Common Misconceptions

Misconceptions about dishwasher use abound. Notably, assuming all metal items are dishwasher-safe can lead to corrosion or discoloration. Additionally, while dishwashers offer convenience, they may not effectively sanitize baby bottles. It's safer to rely on the manufacturer's guidelines for proper cleaning and sterilization. By dispelling these myths, we ensure our kitchen items and baby essentials remain in top condition, demonstrating the importance of accurate information in household maintenance.

Who Should I Call For Professional Dishwasher Maintenance and Repair?

Discover the importance of knowing what items are not dishwasher safe and protect your valuable possessions. At Home Alliance, we're your trusted experts in professional appliance maintenance and repair. Our commitment to quality ensures your appliances and kitchenware stay in pristine condition.
What's more, our service charges are budget-friendly, offering you peace of mind without breaking the bank. Don't risk costly damage – contact us today, and let us take care of your appliance service needs with efficiency, expertise, and affordability. Your satisfaction is our priority!


  • Can I put stainless steel utensils in the dishwasher?
Stainless steel utensils are generally safe for the dishwasher. However, it's best to check the manufacturer's recommendations for specific items.
  • Is it safe to wash ceramic dishes in the dishwasher?
Ceramic dishes are usually dishwasher safe, but be cautious with hand-painted or delicate ceramics, as they may require hand washing.
  • What should I do if my dishwasher doesn't have a specific setting for delicate items?
If your dishwasher lacks a delicate setting, use the shortest and gentlest cycle available to minimize the risk of damage.
  • Can I wash my silicone baking mats in the dishwasher?
Most silicone baking mats are dishwasher safe, but refer to the manufacturer's instructions to be sure.
  • How can I remove cloudy residue from glassware after it has been in the dishwasher?
To remove cloudy residue from glassware, soak the items in a mixture of vinegar and water, then rinse and hand dry them.