LEFTOVERS ARE STILL BEING LEFT AFTER THE CYCLE IS DONE. I RINSE DISHES BEFORE HAND BUT THERE IS A BLACK DISCHARGE ON THE BOTTOM OF THE TUB, AND SOAP STILL LEFT IN DISPENSER.

1 Scrape and rinse dishes before putting them in your appliance. Small food particles, grease, sauces and bones clog up the system, keeping the dishwasher from properly rinsing your dishes. You don't need to prewash the dishes but be sure to rinse off any solids.
2 Use a toothbrush to clean around the dishwasher door.
Clean around the seal and hinges of the dishwasher. This area often is forgotten and holds a good deal of bacteria and food splash. A tooth- or bottlebrush is the best way to get into the crevices.
3 Clean chunks of food out of the screen and drain at the bottom of your dishwasher, recommended The Family Handyman. If the drain is plugged, the dirty water can't be washed away and ends up back on your dishes. Nut, bean and seafood shells, bits of plastic and small dishes can lodge against the drain, keeping it from doing its job.
4 Unclog the holes in the sprayer arms. If the holes are blocked by food or soap, water cannot freely spray inside the dishwasher to thoroughly clean the dishes. Leftover food on the dishes can make the dishwasher smell.
5 Keep space around your dishes. Overloading a dishwasher keeps it from running efficiently, allowing gunk to build up around the drain and the spray arms.
6 Run your dishwasher as hot as possible to break down food and grease. The recommended temperature is 120 F.
7 Run the dishwasher with vinegar added to neutralize odor. Empty the dishwasher, place a dishwasher-safe cup filled with white vinegar on the top rack, and run a cycle at the hottest setting. If you prefer, use unsweetened lemonade powder or baking soda in place of vinegar.

Check the rinse aid dispenser!

Check water quality and the soap you are using.

The problem is hard water. There is a new product out called the dishwasher filtration system. It filters the water before it enters your dishwasher. It works amazing and has a money back guarantee. You will love the way your dishes look after the first load. It is also very affordable (like 70 bucks). Go to www.dishwasherfilter.com to find out more info.

Make certain you do not use dish soap when rinsing the dishes. Make sure you only use DISHWASHER soap when running the DW.
In fact,there is no need to rinse dishes. Remove visible scraps and put them in the DW. If it is a quality DW it will clean your dishes. Do not crowd the dishes in the DW. Most JennAir DW's are quality. Make sure the top rack can get washing action from the bottom spray arm. No pots or other water stopping utensils on the bottom rack.

run unit through a clean cycle. turn on hot water at sink til it gets hot then shut off . then tuen ion dishwasher when it starts washing open door and add 2 cups of white distilled vinegar and let it go through a cycle ( no dishes) when done. turn on hot water at sink before you use dish. also fill both soap cups and use rinse aid or jet dry. you should see better improvements. hope this helps..

Does the dishwasher drain the water properly at the end of the rinse cycle. Meaning, is there any leftover water at the bottom of the dishwasher.

Recommend that you run another cycle with no DW soap aded, waiting until the dishwasher has filled with hot water and begins to do the first wash cycle. Then add 1/2 cup of bleach to the water and close the door. Allow the cycle to finish. Run it normally with a standard load of dirty dishes. Note: These high efficiency dishwashers count on the "dirt" of the dirty dishes to help wash/clean the dishes. Recommend you not rinse/wash the dishes before you put them in the dishwasher.

Watch for any occurrence of the black dots and repeat the bleach treatment.

plugged jets, possible
more likely it is leftover food reminance left in the pump area. and on certain dishwashers it could be a swollen check valve, not allowing the evacuation of the used dirty water.
does your soap dispenser open?

Pour 2 cups of vinegar in to the tub and run it on the hottest longest cycle with no dishes in it. This will clean residue out and what ever "gunk" may be in the internal parts. Use Only powder detergent. No gel and No tabs. These 2 cause a build-up over a period of time and reduce the performance of your machine. Make sure that you use rinse aid.

Suds? If you use dishwashing detergent you shouldn't get suds. If a small amount of sink type dish soap is left on a dish before loading it into the dishwasher this can happen. I would use several rinse and drain cycles with the racks and dishes removed until the suds are gone.

Never use any type of liquid dish soap made for sinks. The same thing that makes suds in the sink will make even more in the dish washer.

Hope this helps!