Despite what dishwasher mfgs and soap companies claim, these do not always remove ALL of the food residue, we typically go over pots and pans with a sponge before going into the dish washer. As for the soap film, I have no idea unless you may have accidentally used a different wash setting? I would continue to use and watch results, if this continues, you may have a failure in the control system and a rinse cycle or similar is not functioning.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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