I had the same problem with my emmenthal and yesterday I took the drastic step of shaving it because scrubbing it with vinegar or brine wasn't doing the trick. I used a cheap single blade disposable razor and shaved the surface of the entire wheel to remove the mold, brined it again for 30 mins and am hoping it takes care of the problem. While it was brining I also sterilized the storage container and rack it sits on.