Cast iron items have been used for centuries and can last nearly forever if cared for properly. To prevent rusting, they need to be oiled frequently. The oil penetrates the surface of the cast iron and the result is an ideal cooking pan. However, if you put a cast iron pan in the dishwasher, it will wash off all the oils and the cast iron pan becomes unusable. If a cast iron item ends up in the dishwasher, you need to start oiling it again so you can use it.
5. Wooden spoons, bowls, cutting boards
The detergents used in dishwashers are quite strong and therefore wash the oils off wooden items, which is exactly what protects them. As a result, wooden items eventually start to crack. Wooden cutting boards and other kitchen utensils should be washed by hand and quickly, using a gentle dish soap. Don't let wooden items soak, as this damages their surface and causes them to swell. If you feel wooden items need to be disinfected, you can successfully do this with a solution made from vinegar and water mixed together.
6. Copper items
Copper items are also damaged by the detergents used in dishwashers, which makes the item's surface dull and can even cause rust. Additionally, harsh detergent can create small holes in the metal surface that cannot be fixed with anything.
7. Pressure cooker and pressure pot lids
You can freely place a pressure cooker pot in the dishwasher, but it's better to wash its lid by hand. The lid has valves where small food particles can get stuck in the dishwasher and therefore it can happen that the pressure cooker no longer works properly and can even break. Additionally, the harsh detergents used in the dishwasher can damage the silicone seals of the pressure cooker lid.
8. Non-stick cookware
Although many non-stick pans have a note that they can be washed in the dishwasher, harsh detergents and high temperatures can damage the pan's surface, making it no longer good for cooking. If you want to wash the pan in the dishwasher, skip the drying cycle and let the pan air dry. If you notice that the pan's surface is damaged, it's time to buy a new one, as a damaged surface can be toxic.
9. Plastic and melamine plates
High temperature and detergent can damage this type of material.
10. Thermal mugs
Thermal mugs are good if you want to keep a hot drink hot or a cold drink cold. Many thermal mugs are made so that there are two layers of material with air between them. The latter is what creates insulation and keeps the drink at its temperature to a large extent. Although some thermal mugs say they can be washed in the dishwasher, it's best to wash thermal mugs by hand. Regardless of whether the thermal mug is plastic or metal inside. If you want to wash a thermal mug in the dishwasher, place it on the upper rack and skip the high temperature drying cycle. If you want to remove coffee stains from inside the mug, use baking soda for this. Then rinse the mug properly afterwards.
Read the 7 remaining items that should definitely not be washed in a dishwasher HERE
Source: Modern Home
