Thanks to Owner-Manuals.com! This manual was exactly what I needed. As Amana was purchased by Maytag and later by Whirlpool, there was no way to receive it from their websites. I was lucky to find this resource.
A comprehensive Operating and Service Manual. All schematics are complete and easy to read. The PCB drawings and complete parts list are very helpful. I would definitely recommend this manual.
Text excerpt from page 26 (click to view)
Operating Instructions
...the wash result is unsatisfactory.
The dishes are still dirty. � The wrong wash programme was selected. � The dishes were arranged in such a manner that water has not reached all parts. The dish racks must not be overloaded. � The filter in the base of the washing compartment is dirty or incorrectly positioned. � Detergent was not used or too little was used. � In the case of scale deposits on the dishes: the special salt container is empty or the water softener is incorrectly adjusted. � The drain hose is incorrectly laid. The dishes are wet and dull. � Rinse aid was not used. � The rinse aid container is empty. There are streaks, milky spots or a bluish coating on glasses and dishes. � Decrease rinse aid dosing. There are dried water drops on the glasses and dishes. � Increase rinse aid dosing. � The detergent may be the cause. Contact the detergent manufacturer's consumer advisor.