One other thing then... when you first got it did it sound like more water was sloshing around??? if you got hard water or a lot of minerals in it,,,that could be clogging the water jets and making them less effective...

it is very hard to diagnose something like this over the internet,,,LOLz...

try opening it mid cycle and see if there is a lot or little water in it,,,water dripping off the plates or if it's dry... if dry put a couple pots of Hot water in it at each cycle,,, if the dishes are better "No or less" film then we know it is the amount of water that is the prob and there is not to much rinsing going on...