Had a real bad odour in my 1 year old Samsung dishwasher. Took apart the pump screan and found it to be clean of any food particles. I then checked under the door bottom on the inside!!!!! OMG! The amount of food residue that was trapped in there was ridiculous. What a stupid design. I cleaned this up with a solution of water,a touch of laundry soap and bleach. Armed with a small paint brush and a spray bottle full of my cleaning solution I got her done in no time. Ps,to those who think you need to wash your dishes prior to placing them in the dishwasher,get real. That is the dishwasher's job! You are simply wasting water. If you feel you need to do that then you either have a bad dishwasher,the wrong dishwasher soap or you don't know how to load a dishwasher properly!
Josh