The answer to this question is that it depends. The original Scanpan - released prior to December 2001 - is not dishwasher safe, and so it must be cleaned by hand. Check carefully if you suspect yours is from the old line. The following models were released after that period, and are dishwasher safe: * Classic * Professional * CTX * IQ * Induction Plus * CSX Although these newer models are dishwasher safe, Scanpan recommends in its FAQ that you only clean them in the dishwasher on every 3rd or 4th occasion. This is one of those situations where a little bit of personal TLC goes a very long way.