When hand prerinsing dishes, use cold water. Avoid energy waste. Put water in pots, pans, etc. to soak when food is removed. Loosen soil by standing. Always put cold water in bowls with flour mixtures like bread or cake.
Hot water cooks the flour and makes it difficult to remove.
For dishwasher washing. It depends on how many dishes must be prerinsed. Remember, the dishwasher prerinses in water from the water heater and takes energy. Wash full dishwasher loads whenever possible. Use the shortest cycle necessary.