best way to clean mold off a cigar?

Where I leave there are no decent B&Ms around. Just a bunch of shops that sell cigarettes and lottery tickets and a cabinet of cigars that they don't know how to take care of. I've been to a bunch of them, but the humidity levels are all over the place.

One shop I went into had 2 partial boxes of MC #4s that were completely covered in green mold. It was really bad and obviously had not been looked at in a long time. Enough to make a guy cry.