OLD KITCHENAIDE MODEL KDI-20 LEAVES SOAP GRANULES ON DISHES.

Check the filtering system and use line filters to eliminate particles that are in your water from entering the washer. Check all of the ports on the spray arm and clean them out. Be aware of the chemicals used to clean dishes as some tend to crystalize when heated and coat dishes. Check that the rinse cycle is working properly and manage your settings accordingly.

Sounds like the capacitor on the motor is bad,

Have you tried checking the filter in the bottom of the dishwasher, if this is blocked it will keep churning the waste matter around on each wash cycle and just drain the water away

we had the same problem with a new dishwasher. The repair man told us that the liquid soap would froth too much and not fully rinse out of the system. So the food particles stayed in the trap and wouldn't rinse away. Also the drain hose needs to be looped up to the top of the dishwasher or ran directly down to drain so the wash water doesn't just drain back into the dishwasher. Also check you top rack water jets to see if there are food particles which move into the holes and block the water flow on that level. Hope this helps :-)

The problem is hard water. www.dishwasherfilter.com has a great new product out that will solve this problem once and for all. It filters the water entering your dishwasher and leaves your dishes looking amazing. They even have a money guarantee if you are not completely satisfied. Check it out. You will love it.

so you need to install a water filter, before you connect water supplie, then you need a special soap to clean wachine (Calgonit diswasher cleaner powder ) use-it without dishes. then use a dishwasher salt (to disolve all water dirt and colour) and rinse liquid (to give a clean glass dimond finish ).
use Calgonit Brand is the most trush, on the masket

may be problem in final rinse not happening.
1)check the final rinse happening at end of the cycle
2)if not happens clean the solenoid filter.
3)clean the boiler tank.

You are not getting enough water in the machine. The inlet valve is probably plugged with sand or something of the sort. You will need to replace the inlet valve.

Usually on the floor there is a grill that strains the water. You may have a buildup of particles there. Your soap maybe old, you may have run out of the liquid that stops spots, or your water may not be hot enough. If the dw is more than 18 months old you probably need to rinse the dishes better before you put them in...especially rice, potatoes, anything with starch in it

Although I previously posted with the same problem of a film on the dishes after cleaning, I did find a section in the owner's manual which solved my problem. Lift up the rinse aid cap on the inside door - the factory setting is on "4". The rinse aid works in conjunction with your local water, which has variations in it's hardness or softness. When your dishes are streaky, lower the rinse aid setting to 1 or 2. If your dishes are spotted, raise the rinse aid setting higher.