In July I purchased a new Whirlpool Gold Series dishwasher model WDF750SAYW1. The machine has done a great job cleaning dishes, but it recently has begun to emit a terrible smell. The odor is not that of plates waiting to be washed. The smell is more akin to that of rotting garbage. I have cleaned out the upper and lower filter assembly though neither had any trapped food. As expected there was a small amount of standing water underneath the filters.
After running the dishwasher the smell is gone. We run the dishwasher a minimum of four times a week. For seven years we never had a problem with the previous dishwasher (its control panel died necessitating the need for the replacement).
Here are some pictures of the hookup:
What should I be doing to fix this terrible odor? Is this a plumbing issue or something wrong with the machine?