Clean washer with vinegar - how?

Two cups of white vinegar straight in the drum, empty machine, hottest and longest cycle (or the tub clean cycle if yours has one). Wipe the door seal and drawer while it runs. Never mix it with bleach, and don't do it every week, some makers say regular vinegar is hard on the rubber seals. Once a month is plenty. On a front loader clean the drain filter too, and leave the door open after.