How do I run the Machine Clean cycle to eliminate odors and white spots?
Remove all dishes from the appliance and add 3 tablespoons (40g) of citric acid to the detergent dispenser. Run the Machine Clean (Download Cycle: P1) cycle and press START. It is recommended to run this cycle once a month or after every 30 cycles to eliminate residual soil, odor, white spots, and other dirt inside the appliance.
From the official LG Drain Series Dishwasher manual, page 39
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