Dishes do not need to be pre-rinsed before being loaded into the dishwasher. Scrape of excess food, like food, fat, and bones but skip the pre-rinsing. Pre-rinsing dishes under running water also wastes a large amount of water per year.
Most modern dishwashers are designed for food particle removal. If there is no food to cling to, the enzymes could damage your dishware resulting in etched or cloudy glasses and dishes over time.
No rinsing is needed unless your dishes and cookware have been left sitting out for several hours. In that case, you may need to soak them in soapy water to loosen particles before loading into the dishwasher.