I have had the same problem with the brie-like cheeses and p.roquefort. I have found the best results in draining the cheeses in cheescloth before molding (Ibelieve the p.roquefort is draining out with the whey if this doesn't happen). In addition, the p.candidum closes up the holes and doesn't allow oxygen in. When piercing, try leaving it out of it's box to allow oxygen in for half an hour every three to four days. As with all blues, this is the key. Good luck!