The dishes on our top rack are coming out completly dirty. Seems like the spinning arm that is supposed to celant hem from underneath is not working properly. We have checked for clogs in the upper arm features and have found none so far. Any ideas?:(

The top rack in my dishwasher wont clean the dishes anymore. Instead it leaves a very greasy film on them especially on the clear plastics. Plus food debris is left also. I have replaced the feed tube (found a cracked rubber in one of the top rack flappers), the chopper assembly (found and removed all crud at the same time) and the check valve plus I have refilled my rinse agent compartment and ran a mix of vinegar and baking soda. i am at my wits end!! I have also opened and closed the door during a wash cycle and both upper and lower arms seem to be rotating. I am not sure how much water is supposed to be in the bottom during a cycle but there didn't appear to be much (1/2" maybe??). Also it might be worth mentioning that my hot water heater is turned up and i do get go pressure. I am suspecting a bad fill valve? a float problem? computer sequencing wrong? New detergent with low phosphates?? I cant find the symptoms on any of the other forums or threads. I do have a water softner that i have had since before getting the dishwasher 3 years ago so cant imagine that is it? I recently repositioned the drain vent slightly (mounted it underneath new countertops). It only does it on the top rack which is the most confusing???? I would also like to know how the drying agent gets dispersed? there doesn't seem to any hoses or openings in its container. Thanks you for any advice i hop ei have painted a good enough pictur