Here’s the guide I used from Way of Leaf for my first flush. The main way that mushroom cultures fail is because they get overtaken by mold spores, so sterilization of everything is VITAL. Spores can be purchased online for microscopy purposes, along with pre-sterilized grain bags with injection ports.
When organizations mess up, why is their first response to the critique to say “Why didn’t you come to us first?” when they really mean “Why did you make this public so we actually have to do something?”
I get really frustrated with the response because it doesn’t come across as a company actually interested in improving, but just throwing accusations back and trying to beg off the responsibility of actually holding themselves accountable.