[abartelpa]

The DW operates correctly, but dishes on upper rack have food particles left on. Started doing this recently at around 10 years old. I noticed the upper arm had a piece of cracked plastic where the water enters from the water stream from the pump. I replace the upper arm, but it didn't make any difference. I'm starting to think it has something to do with the water pressure from the motor.

Can anyone help? What should I try next?