For many people, the dishwasher is part of daily life: load the dishes, insert a tab, start the program - done. But not everything used in the kitchen is suitable for cleaning in the dishwasher. Some materials can be damaged by hot water, harsh detergents or long wash cycles. These items should therefore be cleaned by hand instead.
Wooden cutting boards and kitchen utensils made of wood
Cutting boards, wooden spoons or salad servers made of wood don't belong in the dishwasher. The high temperatures and prolonged exposure to water can cause the material to swell, warp or crack.
Bacteria can also settle more easily in the small cracks. Wooden utensils should therefore be cleaned by hand with warm water and mild dish soap and then dried thoroughly.
Sharp knives
High-quality kitchen knives should also not end up in the dishwasher. Heat and harsh detergents can damage the blade and cause it to become dull more quickly. Additionally, knives in the dishwasher can damage other items or pose a risk of injury when unloading.
Particularly sharp chef's knives and knives with delicate handles should therefore always be washed by hand.
Coated pans and pots
Pans with nonstick coating often don't tolerate cleaning in the dishwasher well. The coating can be damaged more quickly by strong detergents and high temperatures, causing the pan to lose its properties.
Even with pots that have delicate surfaces, it's worth checking the manufacturer's instructions. Gentle hand cleaning often extends their lifespan.
Crystal glass and delicate glassware
Not every glass is dishwasher-safe. Particularly thin wine glasses, crystal glasses or handcrafted glasses can be damaged by the high temperatures and movement during the wash cycle.
With delicate glasses, there is also a risk that they will become cloudy over time. Anyone who wants to enjoy them for a long time should clean them carefully by hand.
Cast iron pans and pots
Cookware made of cast iron should never go in the dishwasher. The harsh detergent can destroy the baked-on protective layer, known as the patina. This can cause the material to start rusting.
Cast iron should instead be cleaned with warm water and then dried thoroughly. If needed, the surface can be treated with a little oil.
Kitchen utensils made of aluminum
Aluminum can be attacked by dishwasher detergent. The surface can discolor or become dull. This includes, for example, certain espresso makers, baking pans or older kitchen utensils made of aluminum. If you're unsure, check the manufacturer's labeling.
Thermal mugs and insulated drinking bottles
Many thermal mugs and insulated bottles are not suitable for the dishwasher. The heat and water pressure can damage the seal or impair the insulation. Especially with high-quality drinking bottles, it's worth checking the manufacturer's care instructions.
Kitchen utensils with glue, labels or delicate decorations
Mugs with prints, decorated plates or items with glued elements can be damaged by regular dishwasher cycles. Colors can fade and decorations can come loose. Especially with heirlooms or special ceramic pieces, hand washing is the safer choice.
What can go in the dishwasher without problems?
Most modern plates, glasses and cutlery made of suitable materials are designed for the dishwasher. Products often have a label such as "dishwasher-safe" or a corresponding symbol.
Nevertheless: For high-quality, delicate or cherished kitchen utensils, it's worth taking a quick look at the manufacturer's instructions.
