LG Washer Dryer - What should I do when drying time keeps increasing

What should I do when drying time keeps increasing?

  Cause

        - Drying time varies depending on load, spin level, or cleanliness of a filter.

  How to fix

       - Dryer detects progress in Sensor Dry mode and controls total drying time,
          therefore the time displayed earlier may change.

       - A sensor detects dryness when displayed remaining time is six minutes for an gas dryer
         and 11 minutes for an electric dryer   to control drying time.  

        - Drying time can increase at this time, and it may change few times depending
         on progress and amount of laundry during a cycle

       -  If the laundry is not completely dried even after drying for a maximum number of hours, 
          add time in Manual Drying or Timed Drying.