Things You Absolutely Should Not Put in a Dishwasher

🧼 Dishwasher Dos & Don’ts

Your dishwasher is a marvel of convenience—but it’s not made for everything. Hot water, strong detergents, and high-pressure jets can damage certain items quickly, sometimes beyond repair.

Here’s a practical guide to what should never go in the dishwasher—and how to care for them instead.


đźš« 10 Items to Always Hand-Wash

  1. Sharp Knives (Chef’s, Paring, Steak)
    • Why: Jets dull blades; detergent corrodes steel.
    • Instead: Wash with mild soap, dry immediately, store in a sheath or knife block.
  2. Cast Iron Skillets & Pots
    • Why: Dishwashers strip seasoning, cause rust, and ruin non-stick surfaces.
    • Instead: Rinse with hot water, scrub (no soap), dry on the stove, and lightly oil.
  3. Wooden Utensils, Boards & Bowls
    • Why: Heat and moisture lead to warping, cracks, and bacteria.
    • Instead: Hand-wash, air-dry upright, and condition monthly with mineral oil.
  4. Nonstick Cookware (Teflon, Ceramic, etc.)
    • Why: Detergent breaks down coatings, causing flaking.
    • Instead: Use a soft sponge with mild soap; avoid steel wool.
  5. Insulated Drinkware (Yeti, Hydro Flask, Thermos)
    • Why: Heat damages vacuum seals; gaskets trap grime.
    • Instead: Wash the body by hand; clean lids and gaskets separately with a bottle brush.
  6. Aluminum Bakeware & Pans
    • Why: Detergent reacts, leaving dull, dark, or pitted surfaces.
    • Instead: Hand-wash with a gentle cleaner (Bar Keepers Friend works well).
  7. Copper Cookware
    • Why: Loses shine, tarnishes, may leach metal.
    • Instead: Wash by hand; polish with lemon + salt or a copper cleaner.
  8. Fine China & Metallic-Rimmed Dishware
    • Why: Gold/platinum fades; delicate glazes crack.
    • Instead: Wash gently in warm, soapy water; dry with a lint-free cloth.
  9. Crystal & Hand-Blown Glass
    • Why: Heat causes cloudiness or cracks.
    • Instead: Wash carefully by hand; avoid sudden temperature changes.
  10. Graters, Garlic Presses & Small Gadgets
    • Why: Food lodges in crevices—dishwasher can’t clean thoroughly.
    • Instead: Scrub immediately with a small brush under running water.

⚠️ “Use With Caution” Items

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