Cast Iron Cookware: Dishwasher washing can remove seasoning and coating from cast iron pans. After handwashing with mild soap and water, dry and re-season if needed.
The harsh detergents and high temperatures in dishwashers can harm pans' nonstick coating, limiting their efficacy. A delicate sponge and mild detergent are best for handwashing nonstick cookware.
Heat and moisture in the dishwasher can distort, break, or fade wooden goods. Air-dry wooden utensils and cutting boards after handwashing with mild soap.
Dishwashers dull knife blades, and high-pressure water jets can nick them. Keep blades sharp by handwashing them in warm, soapy water and drying them quickly.
Dishwashers' strong detergents and high heat can corrode copper cookware. Handwashing copper cookware with a moderate detergent and drying quickly preserves its sheen.
Dishwasher detergents and high heat can haze or damage delicate crystal glasses. Handwash crystal with mild soap and warm water and dry with a delicate towel.
Aluminum cookware can tarnish or be damaged by dishwasher chemicals. Gentle detergent and thorough drying are recommended for aluminum pots and pans.
Printing on plastic containers can fade or peel off in the dishwasher owing to excessive heat and harsh chemicals. Use gentle soap to handwash plastic containers to maintain their look.