I am about two weeks into our fermented feed operation and I now have mold growing on the sides of my bucket. Not ON the feed or the surface of the water, but on the spilled mush on the insides of the bucket. How often do you rinse and start over? How do you prevent mold growth? It's optimal mold conditions here but I did have a "lid" loosely on the bucket. Do I need to dump my water and restart?