Some questions for you....
1. Do you have hard or soft water?
2. How much detergent do you use?
3. Does the detergent you use have jet dry in it, or shine shield?
4. How hot is the water at the sink faucet?

Turn the water heater down to about 130, Ge does not recommend temp above 140. If your water if soft, you are using way too much detergent, 2 tablespoons is plenty of soap. Remember, hard water = more detergent, soft water = less detergent. This is probably your biggest problem. Look at the detergent, does the outside say with shine shield, if it does that is the same as jetdry and by using the jetdry in the tank and in the soap, that is a problem. Use either the jetdry in the tank or in the soap, but not both. Also you say you rinse the dishes well before putting them in, by doing this and using too much soap, you are creating a sudsy mess inside the washer, and nothing will get clean. So to highlight,

1. Use 2 tablespoons of soap, and no more. This is plenty.
2. If the cascade has shine shield, get cascade that does not have shine shield.
3. Turn the water heater down to 130-135

Our new, June 2008, GE Profile dishwasher has never cleaned properly. Silverware always has 10 % or more of the utensils with food left on them. Clear glasses now looked "smoked." This is probably the most expensive and poorest dishwasher we've owned in 30 years:mad:

It's in a new house, on softened well water, with a direct line from the hot water heater with temperature at the kitchen tap of 130F. The repairman insisted the water was not hot enough before even showing up -- after months of complaining. When a repairman finally came on site, water temperature in the dishwasher was much lower than that at the tap, and it took 4 cycles to get the temperature to 120F. He left shaking his head and saying he'd "ask around."

Is the water usage so low that the water for each cycle is less than that in the line from the kitchen tap to the dishwasher?? That's only 20 -24 inches; must be just a few ounces of water. Something doesn't make sense!

A dishwasher has one primary function -- clean the dirty dishes. This one doesn't even come close:(

Does anyone know what might be causing this before I yank it out and drop it in the Appliance Store's showroom?

We have similar problems since new. At first we thought it was the detergent or Jet wash. So we tried all sorts of detergents but to no avail. Now it is only 2 years old. Food particles somehow bypass the filter and clogg up the holes in the spray arms. They stop turning. I have to clean them out before every washing. This is a very bad design. Worst dishwasher we have ever had. I don't know if there is any other solution. Below is a suggestion for the inlet valve! Nonsense. The valve stays open until the water reaches a certain level even if the flow is slower than normal.

Nope gave it away for free. No one wanted to buy it for even $75. Got a new Whirlpool with the pot scrubber jets in back. Amazing dishwasher. We forgot how well a proper dishwasher works. Its the last year that Whirlpools have the food macerator. They are going the Bosch route with a user cleanable filter. Only the Kitchen Aid line will continue to have a macerator.

Good Luck!