My dishwasher's manual says that it's more efficient to rinse even a few dishes in the dishwasher instead of hand rinsing (rinse, not a full wash). The manual s

My dishwasher's manual says that it's more efficient to rinse even a few dishes in the dishwasher instead of hand rinsing (rinse, not a full wash). The manual shows the energy and water used for each function but I just can't bring myself to believe it... (I live in Switzerland where water is so cheap they don't even put individual water meters on each apartment in a building but the electricity to heat the water up can be pricey)