Choose a dishwasher with sturdy compression springs in the door. Also look for tough, lightweight nylon or graphite racks with cushioned tips that protect glassware and cookware. Weimer recommends choosing a model with a rack design that provides the largest, most flexible interior space and is configured for your belongings, including odd-shaped pieces.

Buy stainless spoons (both slotted and non-slotted) which are solid and won't bend no matter how tough the job. Also, buy several high quality wooden spoons for stirring delicate dishes like risotto (the sharp edge of a metal spoon would cut or bruise the rice).

Most of the energy used by a dishwasher is for water heating. The EnergyGuide label estimates how much power is needed per year to run the appliance and to heat the water based on the yearly cost of gas and electric water heating. When it is time to buy a new unit, look for the Energy Star label.