Dishes need to be "pre-rinsed" before being washed in a dishwasher.
Rinsing the dishes before loading them can actually hinder a dishwasher's performance. Detergent is engineered to breakdown debris.If detergent has no food residue to cling to, it could be abrasive on rinsed dishware, damaging the surface. There's a reason you use detergent in the dishwasher and the appliance has a purpose; let it do its job. A quick scrape of large food items before loading dishes into the dishwasher is all that's necessary.