I really wasn't being crass. For whatever reason RV refrigerators seems to stain easier than a home refrigerators.
We often equate stains for "dirty." You know it's not and there isn't any odor either I bet. I've heard of people going so far to get rid of the stains by using Fusion
paint inside a RV
refrigerator. I just put more beer inside... and as I said, close the door
Good luck on the sale! You've done a great job and I know someone is going to get a great trailer.