While dishwashers can disinfect dishes more effectively than hand-washing, the machines do have limitations. Sometimes, even the most powerful machines cannot remove dried-on food debris, requiring you either hand-wash the item or run it through the machine again. In addition, not everything is dishwasher safe. Fine china and crystal, knives, nonstick pots and pans and wooden items can be damaged in the dishwasher, meaning you have to wash them by hand. If you have a large gathering and use your best dishes, cleanup can take extra time. And if you fail to properly load your dishwasher, not only will the dishes not get clean, but you could damage items.