How do I get rid of film that settles on my dishes in the dishwasher?

This strange film suddenly started appearing on my dishes in my dishwasher. I use the jet wash stuff in the cup but nothing seems to help . I find myself having to hand wash most of them after they come from dishwasher. My washer is about 20 years old but it always has run fine. A dishwasher repair person charges a $100 to $150 just to walk in the door in my area. Has anyone out there had similar problems with their washers and found solutions?

Marlene

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