I had similar on my Stacer,
1. used white Vinegar to kill the mold
2. Pulled everything out and gave them a vinegar spray and clean,
3. Then used a carpet cleaner foaming spray from Woollies, like what Frank posted
4. I hired a Steam cleaner from Woollies, did the kids rooms, then used it on the cars and finally on the boat
5. Left in the sun to dry out
I found a Gerni left to much water and takes to long to dry, maybe if you had a aqua vac, then it would be ok.