What to do for the bad smell of my refrigerator?

United States
July 16, 2008 4:45pm CST
I keep my refrigerator always clean. But from last few months I am getting a bad smell coming out of my refrigerator few times when I open the door. I don’t know what the reason is for this. I checked every time and there is nothing rotten or any bad smelling thing. Just wonder how I stop that smell! Do you have any tip to stop that bad smell? Please share your experience and tips here.