These "Instructables" videos are great! No muss, no fuss. I wish I'd seen them to begin with, but it's really so much fun discovering how-to yourself, the way I went has been fine.
Here's part 2 of the Instructables. Notice Tim says if there's mold, you're done. As in, no good. I was so worried that my Kombucha was moldy. In fact, I still think it looks suspicious. But, I had a couple of big glasses of it yesterday and here I am, alive to tell the tale.
It's interesting that one commenter says "Using plastic leeches particles into the tea. It isn't healthy."
Loads of fun and satisfying because it's something you do yourself. In my opinion, there's nothing better than making stuff yourself. Enjoy!