If you are using your great-grandmother's china that came over from England, it's probably best to wash it by hand using a gentle dish detergent and warm water. On the other hand, newer china is often made for the rigors of today's day-to-day life, including being washable in the dishwasher. Again, check the information provided about your china or look on the bottom of the dinnerware to see if it has been designated as dishwasher-safe.