I started a blue (the generic "blue" from EHC) a couple weeks ago; the blue mold was coming in nicely at around a week, when I skewered it with a sterilized pick. But now, about a week later, the blue hasn't seemed to spread any more, and white penicillin mold is taking over. What should I do? A similar thing happened with my last blue as well, except the red mold took over. My frozen roquefort cultures may be on the old side.