Went 4-wheeling on a Thursday and our clothes got muddy.  Put muddy clothes in a bag, and washed them 2 days later when we got home.  Used deep wash and heavy soil settings with warm water.  Clothes were clean when wash finished.  I was curious, so I watched through glass lid during rinse cycle.  After muddy clothes washed, they were sprayed with rinse water for 1 or 2 minutes, and the muddy rinse water was draining out as it was spraying.  So clothes were not being rinsed in dirty water.  Then washer filled with clean rinse water, and clothes came out truly clean!