Who doesn't love their washing machine? It makes the task of laundry so much easier. But have you ever thought about washing your washing machine? You should: Over time, dirt, grime and excess detergent can build up. Twice a year, clean your washing machine to help keep it working like new. Choose the hottest water temperature setting and pour 1/2-cup baking soda where the powdered laundry detergent goes. Run the washer empty. This will scrub away bacteria, soap scum, deposits, dirt and anything else that may be in there.