So many different "tricks" for cleaning the dishwasher with vinegar. I'm trying the 1/2 of white vinegar on the top shelf, empty washer, full pots and pans cycle, In hopes of salvaging our 23 yr old dishwasher.... It's run in perfect health until a couple months ago, when it started leaving significant white film and grunge on everything. Fingers crossed! She's served well, for a very low-end machine of her age.