Why do I need to cover the fermenting Kombucha Tea containers?
You need to cover the fermenting Kombucha Tea with a cloth, or unbleached paper covering, to prevent air-borne dust (which may be laden with mould, bacteria and wild yeast spores) from getting into your fermenting Kombucha. These covers will also allow oxygen to reach the colony, and allow carbon dioxide gas to escape. To stop fruit flies etc., from crawling in under the cover, make sure the edges are held tightly to the container with an elastic or rubber band.