You should only clean cookware in the dishwasher if it is labeled 'dishwasher safe' in the use & care guidelines that came with the cookware. In some cases, you can also find an icon or other marking on the underside of the cookware base, which indicate if it is dishwasher-safe.
While many of our products are dishwasher safe, we recommend hand-washing cookware when possible to help ensure the product's longevity.