The following Everyday Savings Tip comes from, Amberley:
Front load washing machines are air tight and mold thrives in the grooves in the door. To get rid of the mold and smell, there is no need to buy the expensive washing machine cleaner.
To keep your front load washing machine from getting that moldy smell, run the run the sanitize option with just 1/2 cup bleach once a month. Sometimes I will throw the shower curtain liners in that “super” washer cleaning cycle. The washer is fully sanitized!
You can help to keep it this way by removing laundry immediately and by leaving the door open between uses to dry it out.