What should I do before washing my first load of laundry in the WAW285H1?

You should run a Drum Clean cycle with no laundry before washing your first load, because the washer was tested at the factory and a small amount of residual water may remain in the drum. First add 1 to 2 tablespoons of detergent to the main-wash chamber II, then run the Drum Clean cycle and wait for it to finish. (Page 23)