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Items That You Should Never Put Into The Dishwasher

It’s pretty evident how having suitable machines, such as a dishwasher, in your house to help you with daily chores can make your life a lot simpler and more convenient than ever before. Dishwashers have proven to be lifesavers, especially in today’s world where people barely have time to wash and clean each dish individually. The time and energy saved in chores by using a dishwasher can be applied elsewhere, such as spending time with your family and friends or following your long-lost hobby. But again, these appliances come in handy only when you treat them with the care and attention they deserve. 

When we talk about a dishwasher, its safety should always be your lookout. And one of the best ways to ensure the safety of your dishwasher is by knowing what not to put in it. That’s right. There are a few things that you should not be in your dishwasher, which is for the safety of the dishwasher and the dish.

Why Is This Important?

Before we get into the details, let’s understand why it is so vital to ensure dishwasher safety in the first place. To answer the question, know that dishwashers can be helpful only up to a specific limit. Many materials and dishes are simply not fit to be in a dishwasher. Eventually, you will have to either replace or repair it, and the ultimate result of this would be a shortened life of your dishwasher. 

Take-Out Containers

If you don’t cook regularly, your house will be full of take-out containers. And let’s be honest, if these containers are in good condition, they can be routinely used to carry lunch or for storage purposes. Keeping this in mind, many people start treating them as regular containers and throwing them in the dishwasher for cleaning. However, they fail to realize that take-out containers do not come under dishwasher-safe cookware, especially if they don’t have the mark of it. 

Cast Iron Pots And Pans

Pots made with cast iron generally have a nonstick surface on the outer side, and this surface is created after a lot of time and effort. But, when you blindly put your iron pans in the dishwasher, the dishwashing detergent does its job of aggressively and thoroughly cleaning it. The harsh cleaning of the dishwasher will strip off the nonstick layer, allowing your pan to rust soon.

Copper And Aluminum Pans

Both copper and aluminum pots and pans are great for cooking and are usually in most kitchens. However, containers made from these two materials need to be kept away from the dishwasher for two different reasons. In the case of an aluminum pot, you should know that having them washed in a dishwasher can make them tarnish and result in dark stains and marks on them. In the other case, when you have utensils made of copper in the dishwasher, the luster that they hold may just go away, and that simply kills all the charm of copper utensils. 

Sharp Knives And Grinders

If you have professional knives, or generally, sharp knives in your kitchen, make sure you wash them with your hand instead of putting them inside the dishwasher. Again, this is because the harsh and extensive cleaning done by a dishwasher can cause the knives to lose their sharpness. Over time, they may become blunt and ultimately lose their purpose of cutting. This is why it is best to always hand-clean your knives without relying on the machine. Similar is the case with grinders, too, as they also have sharp blades which can become blunt soon. 

Items Made Of Wood

If you use wooden items in the kitchen such as a wooden cutting board, wooden spoons, spatulas, etc., you should prefer cleaning them in the sink and not in the dishwasher. There are two reasons behind this. The first one is that dishwashers can cause the wooden surface to lose its texture over time, which would make the utensils entirely pointless. And the other, more important reason is that the hot water that runs inside the dishwater can seep and settle into the cracks of the wooden item, resulting in the formation of mold. 

China Or Milk Glass

These days, china and milk glasses are in most demand because of the versatility they bring at a not so expensive cost. However, these are delicate containers meant to look stylish and adorable. And when you wash them inside a dishwasher, the china or milk glasses begin to lose their charm. They become dull and lose much of their vibrance too. In addition to that, these glasses turn yellowish, which makes them look unclean and simply unappealing. 

Anything With Paper Labels

Many containers come with labels made of paper and stuck onto the container with strong glue. But, when these containers are washed inside the dishwasher, the machine cleans them thoroughly and even helps get rid of the paper labels stuck on them. These paper labels turn into bits and papers, but they ultimately come together and can clog the dishwasher’s drain. This will keep the dishwasher from functioning smoothly. It is also possible that the paper bits could stick onto other utensils present in the dishwasher, which is again messy trouble. 

In Addition To These, Here Are Some More Items To Keep Out Of The Dishwasher

  • Silverware Or Gold-Plated Plates
  • Thin Plastics
  • Painted Dishes And Glasses With Prints
  • Insulated Mugs Or Thermal Glass
  • Your Pet’s Bowl Or Feeder


All in all, your dishwasher can be of great use only when you use it for the right things. As efficient as it can be, it is still a machine that accepts only dishwasher-safe containers. Anything other than that can create a problem, be it small or big. This is why it is best to be careful and aware right from the beginning, so you don’t have to regret any decisions later.