Our Egg resides on the back patio. My husband placed all the racks etc inside after our last cook....when I went to open the egg up to use it after a couple weeks, it was covered in fuzz on the inside....we have taken out everything except the firebox and fire ring and scrubbed the heck out of it all. The fire ring has some fuzz on it too....I am unsure of cleaning for the ceramic parts.....do we just do a big burn? I know we aren't to use cleansers do any kind on the ceramic parts.....should we simply load it with fresh lump and burn away at a high temp? Will it be safe for use after that? Have we ruined it? How do we prevent this from happening again?