Barbara is correct. You need to get rid of the mold, as it will wipe your colony if allowed to continue. If the mold is isolated to one spot, you could just clean that one spot, but I highly recommend that you remove everything and clean the container good with a 10% bleach solution. Put in fresh eggcrates or whatever you use for furniture and fresh food and moisture. As she said, if you are misting, don't do it. Also, make sure you have good ventilation when the lid is on. Lack of ventilation will raise the humidity quite high and creates ideal conditions for mold to grow.