I have been brewing Jun Tea for quite a while now and never had any issues. My last batch had green mold on top of the brew and never really grew a new SCOBY after 7 days. There were tomatoes going bad next to my brew so I figured that was where the mold came from. I threw everything out and started a new batch. This time it's growing this white substance (there is nothing next to my brew this time) . What is it? It has been hotter than usual. The brew has been ranging from 65-77 degrees. Is it too hot?