They don’t seem to be dishwasher safe. I put 2 lids in dishwasher and the handle was discolored, not a fresh brand new black handles but  faded appearance. I no longer put any pieces in the dishwasher, everything is hand wash. The bottom of the cookware outer circle around the bottom of the pots & pans are no longer black but seems to have wore off. 
I do absolutely love the inside of the cook ware, 100 % stick free.