We are sorry rust appears on your stainless steel casserole. This might be the result of fly rust in the dishwasher. These stains on the surface of your product could be caused by prolonged exposure to salt and moisture in the dishwasher. Acidic foods can also cause corrosion to your stainless steel products.
Solution
Corrosion stains can be easily removed with a soft cloth and a mild washing-up liquid or with a stainless steel cleaning product. The stains do not affect the safety or performance of your cooking products. Please note: if you choose not to remove the stains, the damage may become permanent.