It depends on the product. Some are dishwasher safe; others are not. Check the manufacturer’s care and use instructions to be sure.If you are just steaming tamales (as opposed to making a stew or sauce), you might be better off washing the steamer by hand instead of trying to wedge all the pieces of it in a dishwasher. Hand washing can usually be accomplished with a bit of mild dish soap, warm water, and a cloth. Dry your tamale steamer thoroughly before storing it.