This is the big cause of issues for us (Bosch 800). Either the arms are blocked or the holes clogged, or the middle rack's hose junction hasn't properly mated w

This is the big cause of issues for us (Bosch 800). Either the arms are blocked or the holes clogged, or the middle rack's hose junction hasn't properly mated with the water source at the back of the machine. Overall I'm really happy with this machine though; worth the pretty penny it costs.