This dishwasher has worked great since we got it, it is about 2 years old now.
The problem now is that it is leaving the glasses and items on the top shelf mostly with food particles up inside them and on them. My husband took the upper wash arm apart thinking that it was maybe full of gunk but it is clear of anything. Any other thoughts or suggestions? Is there a filter that needs to be taken apart and cleaned that the water goes through as it is recycled? I know our old dishwasher had a filter we had to clean but we don’t see one on this one and we don’t want to start taking it apart until we have a little advise.
Thanks for any help anyone can be 
Christi