I don't know if this will work for you or not, but I read in another thread that someone has used "Wet n' Forget" to clean up their mildew and mold issues. I bought a gallon of it at the local Ace hardware store and will be spraying it onto my bunk ends of my roo once I get settled in our spot in a few weeks. It can be bought online as well, price varies from place to place, but from everything I've read, it's well worth a try. Good luck.
Where we've been:
2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP