The estimated yearly operating cost is on the bottom of the label. Match the water level, water temperature and the amount of detergent to the size of the load. Don't pack the items to be washed in too tightly. This will cause the washer to wear out more quickly. If the washer has a lint filter, clean it frequently.
Full loads are more economical and efficient, and save water and energy.
Agitation is used to provide water action removing soil and dirt in top loaders. The agitator usually has vanes of aluminum, steel or plastic. The rinse action of a washer is designed to remove suspended soil, laundry aids, and prevent minerals in rinse water from creating films. A spray rinse during the spin phase creates a flushing action to remove soil. A deep rinse fills the basket with clean water, and briefly agitates or tumbles to flush water through the fabrics, removing soil and dirt.