It is generally not recommended to put metal items in the dishwasher with other plastic dishes. The reason for this is that metal and plastic have different tolerances to heat and water pressure, and combining them in the dishwasher can lead to potential issues.
Here are some considerations:
Heat: Dishwashers use hot water during their cycles, and some metal items, especially those made of aluminum, can react with the hot water and potentially corrode. Additionally, if the metal items get too hot, they can damage or warp nearby plastic dishes.
Water pressure: Metal items may block the water flow in the dishwasher, which can result in poor cleaning performance for both the metal and plastic dishes.
Rust and Stains: Some metals, like cast iron or certain types of stainless steel, can rust when exposed to water for prolonged periods. The rust can stain the plastic dishes and affect their appearance.
Scratching: Metal items can scratch and damage plastic dishes during the dishwasher's agitation cycles.
To avoid potential problems, it's best to separate metal items from plastic dishes and follow these tips:
Hand wash metal items: Items like knives with wooden or plastic handles, delicate metal utensils, or items with non-stick coatings should be hand washed to maintain their condition.
Use dishwasher-safe plastics: Ensure that the plastic dishes you put in the dishwasher are labeled as "dishwasher safe." Not all plastics can withstand the high heat and water pressure in a dishwasher.
Follow manufacturer's instructions: Always follow the manufacturer's guidelines for loading the dishwasher and which items are safe to wash together.
Consider using dishwasher-safe metal items: Some metal items, like stainless steel cutlery, are generally safe to use in the dishwasher as long as they are high-quality and dishwasher-safe.
By taking these precautions and following the dishwasher's user manual, you can avoid potential damage and maintain the longevity of both metal and plastic items.