There is a difference between storing it to drink and storing it for aging. If you store it to drink keep it dry as you do with other teas otherwise humidity matters for the process.
I don’t know the exact numbers but there is discussion about what the best humidity is. Some think that dry storage (humidity ~60% if I remember the numbers correctly) or wet storage (humidity >80% or so).
Although I did not recognize the name I heard of it before. But in a historical sense. It was played a lot before Rikyu and others developed the well known ceremony. This development was actually (among on other things) a reaction on this kind of games where very valuable prices could be won.
I also encountered it on a few other places in Japanese tea history, but I did not realize it was still being played.
It is ok that health and teabags get more people into tea. I just hope for them that is does not stop there and they grow into better quality tea and enjoyment.
I think that with the British and Dutch tea drinking comes more from culture than health issues. However I think the health reason does have its influence on the tea choices people make (for example drinking more green tea and some puerh). I.e. the way the tea landscape looks like.
Luckily there is also a rise in demand for more quality teas for more enjoyment. (and showing of unfortunately)
@jackie. Maybe that’s the reason. Tea will be bought a lot, not coffee. But the gesture stands.
An yes we are overprotective or at least protective in a way that is a lot of trouble for the good people and next to none for those that want to cause trouble.