I recently tried a batch of Camembert, which I haven't made for a while, and experimented by adding some finely sliced Nori or sushi wrap (seaweed) layered into the cheese. After five days a grey mould started to appear in spots around the cheese, I am not sure if this is because of the Nori, or, I have contaminated the cheese somewhere in the process. I have included a photo of one of the cheeses. Any suggestions as to whether this is a bad mould or can I just wipe it with a vinegar solution.