This happened to me about 2 years ago. I chopped down my meds, hung em to dry, and put a fan in the room. The temps got down to 60 at times, and I really believe this was the reason for the mold. Ahhh the price of being a newbie lol... I was so bummed... Now I just simply let them hang dry for a DAY, maybe 2 at the most... then I brown paper bag them.. opening up the bag each day for 20 minutes to an hour. In about a week they are ready. Im sure there are far better ways to go.