Calphalon Corp in Toledo, Ohio, US (United States)

Only Calphalon offers home chefs all three essential cooking surfaces: infused anodized cookware, stainless steel cookware and nonstick cookware. 

Enamel Cast Iron, Calphalon Tri-Ply Stainless and Simply Calphalon Stainless are 100% dishwasher safe. However we recommend hand-washing to keep your cookware looking its best. 

What kinds of cleaners can damage my cookware? Oven cleaner, Mr. Clean® and other liquid household cleaners, dishwasher detergent, etc., can damage your cookware beyond repair. Damage caused by these items to clean your cookware will void your warranty. 

How do I clean my hard-anodized cookware? After each use, wash hard-anodized surfaces in hot, sudsy water using a nylon scouring pad - we recommend Scotch-Brite™ dark green scour pads. 

Sometimes after I wash my stainless steel cookware, I notice a strange discoloration---a shadowy rainbow effect in the metal. What causes it? How can I restore my cookware's regular color and luster?