It might be your dishwasher's water not getting hot enough to dissolve the detergent. Is the hot water from the tap still as hot as it should be (meaning no hot water heater problems)? If your dishwasher heats the water before it washes the dishes, it could be a burned out element.

Olychick, no hot water problems and I tried Great Value and no residue for undissolved detergent. It just didn't clean as well as the pods.

Lindac what do you use and how does it perform?

Just plain ol' Cascade powder....I like that I can adjust the amount for times when I am washing "clean" dishes.....say things that have been in storage or after a party when I have a load of glasses and cups and saucers.
I had heard that the pods could clog your system....but poo pooed it....until I had to call the repair man because my 2 yearold Jenn Aire dishwasher wasn't getting my dishes clean.

I don't use regular Cascade, since they changed the formulation. I use the professional version, which I order on-line.

How are they different?

The professional one still contains the phosphates, which they removed from the consumer one. It's not very green, but I found the consumer cascade was ruining my dishwasher and flatware.

akarinz were you using cascade powder-consumer- and how was it ruining you dw and flatware?