Certainly, Swiss Diamond cookware is dishwasher safe for both the top and bottom racks. However, depending on your choice of dishwashing detergent, you may observe a powdery gray residue on the pan's base. This residue results from a reaction when the aluminum base interacts with certain dishwashing detergents. Recent legislation has made phosphates, once used to safeguard metal surfaces, absent from detergents in the United States and other countries. This change has led to quicker discoloration on aluminum.
While this residue is not harmful and is believed to consist of atomic hydrogen, a naturally occurring element, it may contribute to permanent discoloration over time. To address this, various methods can be used to remove the gray powder, or aluminum oxidation:
- Create a paste using baking soda and water.
- Use an aluminum cleaner available in your local supermarket.
- Prepare a solution of 1 quart (1 liter) water and 3 tablespoons (45 mL) of a natural acid like lemon juice, cream of tartar, or white vinegar. Bring it to a boil inside the cookware and then use the same solution on a sponge to clean the exterior and the base.
To maintain the longevity of your Swiss Diamond cookware, we recommend hand-washing with a dish brush and hot, soapy water.