[DIYbio] Has anybody done a scoby project similar to The Thought Emporium

I have tried it, by myself in my kitchen. Six batches with 4 l sweet tea. I have notes in my lab-book to prove it (video 1). But in my experience growing it yourself in the kitchen is not the way to do it. Every time I tried it, it predictable started to mold (video 2).
Sure I have tried to clean everything in my kitchen first with soap then with bleach. But let's say every m³ of air in my kitchen has X mold spores. As you know, X is an astronomically large number that even if cleaning with bleach is so effective it reduce the number of spores to 0.1X / m³, there will be tons of mold spores contaminating the batch. In the other hand, it is not like everyone browlnf kombucha has access to a lab with HEPA filters and UV-light and stuffs. I think it should be possible to make att home.
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