I've had my Kenmore HE4t for 3 years and have never had a problem with the washer developing an odour. I use Tide HE and leave the door open after use. I did have a problem with smelly towels but then I started using the sanitary cycle and now the smell is gone. I guess the water in my water heater must be hotter since the sanitary cycle runs for 2 hours.
Gary
Gary