You MUST NOT use Kombucha that has mold.
Some alcohol is produced in the fermentation process.
In my case, there appears to be some therapeutic medicinal value to Kombucha use. The facts are likely somewhere in between. I treat my cultures as I would foods that require refrigeration. However, I do note that the cultures remain healthy for extended periods of time at room temperature, so long as they are immersed in their own tea product. Again, we make no claim as to the medicinal properties of Kombucha, other than reference to personal experience.