In July I purchased a new Whirlpool Gold Series dishwasher model WDF750SAYW1. The machine has done a great job cleaning dishes, but in recently has begun to emit a terrible smell. The stench is not that of unclean plates sitting in the dishwasher too long. Put differently the odor is not that of the 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?