18 things you should never put in the dishwasher (even if the temptation is strong)

The natural oils in the wood? The ones that make it smooth and durable? Dishwashing liquid removes them. What’s left is dry, brittle wood that eventually cracks.

And soaking only makes it worse – it warps, swells up, everything is simply ruined.

Briefly hand wash. Dry immediately. That’s how.

Kitchen knives:
Putting knives in the dishwasher is like throwing your phone in the washing machine and hoping for the best.

Three problems at once:

The blade will dull faster.
The handle (especially if it’s wooden) can splinter.
There’s a risk of cuts when taking it out.
Frankly, a good knife deserves better. Wash it by hand – it only takes 10 seconds.

Cast iron cooking utensils
If you’ve ever seasoned a cast iron pan, you know this hurts.

Dishwashers remove this carefully built-up layer of oil in no time. Gone. Just like that.

And without it? Rust. Clogging. Regret.

Yes, even enamelled cast iron is not completely safe here. Caution is advised.

The insidious troublemakers:
Aluminum pots and pans.
Have you ever noticed that aluminum looks dull and stained after being washed in the dishwasher?

This is not a one-off event, but a chemical reaction. Over time, it leads to corrosion and pitting.

Even if “dishwasher safe” is stated, this is often a technical, not a practical, truth.

Cookware and mugs made of copper.
Copper is beautiful. That warm glow? Unrivaled.

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