H.A.
Ditto to the load of hot water and bleach. Also, we don't have the duet, but do have a front loader and on our instruction manual, it instructs to leave the door ajar when not in use to allow for any excess water to evaporate. And, if you are washing any baby clothes, look for a missing sock. We just found one that had gotten stuck under the seal (small little buggers) and would have caused a mildew problem had we not found it.