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Things You Should Never Put in the Dishwasher

February 11, 2020 By Lisa Sharp 15 Comments

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Dishwashers are wonderful things but there are some things you should never put in the dishwasher. 

retro image with retro housewife washing dishes

I love my dishwasher, I went years without one and would prefer to never do that again. I hate washing dishes so it’s nice to have them cleaned automatically. Unfortunately, there are some items that you shouldn’t put in the dishwasher.

I tend to avoid these things for the most part but there are things like my vintage Pyrex collection that’s always worth the extra time washing. 

There are many other items that can be damaged by the dishwasher or even harm your dishwasher. Knowing what can go in the dishwasher and what shouldn’t is very important.

You, of course, want to check to see if the item itself says it’s dishwasher safe. Most dishes tend to state this at least on the box and some even on the bottom of the dish. 

Some of these listed items will say dishwasher safe but they still are best hand-washed to make sure they last and work as well as you’d like them to.

Things You Should Never Put in the Dishwasher

Always have a clean kitchen with these 5 easy daily habits

1. Wood

The high-heat in a dishwasher can warp wood. It’s best to handwash wooden items and let them air dry. It’s also a good idea to avoid soaking wooden for similar reasons. 

2. Non-Stick Cookware

I encourage you to make the switch from Teflon cookware and bakeware to safer cookware but if you are still using it you want to keep it in as good of shape as possible. This means handwashing it because dishwashers can damage the coating.

3. Cast Iron

Cast iron relies on you seasoning it to create a non-stick surface. Putting your cast iron in the dishwasher will remove the seasoning and you will have to start over. It can also cause damage to your cast iron over time.

4. Vintage Dishes

Vintage dishes weren’t made with dishwasher in mind. Often their paint won’t hold up in the dishwasher. Another issue is the fact that many vintage dishes contain lead and putting them in the dishwasher can damage them and make it more likely that the lead can become accessible.

5. Crystal

Crystal is delicate and the high-heat can cause it to crack. Crystal can also contain lead making it best to avoid in general, though lead-free crystal is becoming more common, but if you do use it be sure to handwash carefully.

6. Insulated Mugs and Cups

Insulated mugs and cups have an inner layer that helps keep your drinks hot or cold. When you put them in the dishwasher water can end up in this layer ruining the insulation capabilities.

7. Knives

Honestly, my butter knives and steak knives usually go in the dishwasher but not my good knives. I have a Wusthof knife set and those knives are always hand-washed. Putting them in the dishwasher will dull the blades. They can also damage other items in your dishwasher.

8. Graters, Garlic Presses, and Microplanes

Anything with tiny holes can end up harder to clean once they go through the dishwasher. Often the dishwasher can’t get all of the food out of the small holes causing pieces of food to dry on and become very difficult to remove.

I often lightly hand wash these items, making sure there is no food left, and they stick them in the dishwasher to sanitize them. This is an option if the item is stainless steel and dishwasher safe.

9. Rubber Seals

While most parts of your blender are likely dishwasher safe the rubber seal should be hand-washed. Same with other rubber seals. Rubber will break down over time in the dishwasher, it will last longer if you handwash it.

Some seals are now silicone which holds up to heat and can usually go in the dishwasher but check before putting any seals in the dishwasher.

10. Copper

Copper is becoming popular again, for good reason, it’s beautiful. The only thing is putting it in the dishwasher can dull the copper and discolor it. Skip the dishwasher and handwash it instead.

11. Jars with Labels

This may seem like a great way to get those labels off or maybe you just don’t want to bother to remove them. Either way, those pieces of paper can clog up your dishwasher and cause big problems.

Things You Shouldn't Put in the Dishwasher, never put in the dishwasher, hand washing #cleaning

Helpful Handwashing Tools

We all have somethings that need hand-washed and it’s nice to have the right tools to make it easier. These are some of my favorites.

More Cleaning Tip Resources

  • 13 Cleaning Hacks You Need to Try
  • How to Make Cleaning Fun
  • 7 Cleaning Hacks from 1950’s Housewives

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Filed Under: Homemaking, Cleaning

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Reader Interactions

Comments

  1. Carlo

    March 12, 2018 at 9:59 am

    Thank you, this is a very useful list! Shame on me, I’m guilty about the jars with labels, graters and wooden spoons… 😀 Hopefully I’ll keep all these listed items in mind now! Keep up the good work on your blog 🙂 Carlo

    Reply
    • Lisa Sharp

      March 12, 2018 at 7:35 pm

      Glad it helped. Yes, do better. haha

      Reply
  2. Becky @ Disney in your Day

    March 12, 2018 at 12:55 pm

    I just sent this to my husband because he just puts EVERYTHING in the dishwasher! I also hand wash mugs with meaningful designs on them, because I’ve had a few get messed up in the dishwasher.

    Reply
    • Lisa Sharp

      March 12, 2018 at 7:34 pm

      haha! My husband knows I have vintage pieces that will be ruined in the dishwasher so he leaves a lot in the sink and lets me decide if they can get in it.

      Reply
  3. Amanda

    March 12, 2018 at 8:16 pm

    I never thought about not putting graters in the dishwasher but it makes sense! Great advice!

    Reply
    • Lisa Sharp

      March 13, 2018 at 8:24 am

      It’s one of the things I recently learned.

      Reply
  4. Angela

    March 12, 2018 at 8:29 pm

    I had no idea that you’re not supposed to put non-stick pans in the dishwasher. Thanks for the information.

    Reply
    • Lisa Sharp

      March 13, 2018 at 8:25 am

      You’re welcome!

      Reply
  5. Taylor Mobley

    March 13, 2018 at 8:20 am

    Thank you for this awesome list!!

    Reply
    • Lisa Sharp

      March 13, 2018 at 8:25 am

      You’re welcome!

      Reply
  6. Parul

    March 13, 2018 at 9:48 am

    I realized what mistakes I’ve been making as I was reading this post. I once put my chopping board in the dishwasher and it broke into two pieces. Also the cast iron came as a surprise. But you’re correct!

    Reply
    • Lisa Sharp

      March 13, 2018 at 9:56 am

      Oh no! Hopefully, these tips help prevent other disasters.

      Reply
  7. Deanna Piercy

    March 13, 2018 at 12:46 pm

    Despite having a dishwasher (and grateful for it!) I still end up hand washing a lot of dishes every day because somehow we ended up with a lot of these items. I also hand wash certain glassware simply because our water is so hard that they don’t come out as sparkly as I’d like.

    I didn’t know about the grater, though. I have a box grater which I always put in the dishwasher because it’s a pain to hand wash without shredding the dishcloth. I do rinse it well first, though.

    Reply
    • Lisa Sharp

      March 13, 2018 at 5:32 pm

      Yeah, I think if you rinse them right away and well it’s fine for graters.

      Reply
  8. Satyen

    March 20, 2018 at 12:44 pm

    Great
    Thanks for information

    Reply

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Welcome to my blog! My name is Lisa and I'm the Retro Housewife trying to live a greener life. I share my love of all things vintage, homemaking and green living here on the blog. To read more, click here.

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