I haven't checked all your facts, but watch your spelling. Stomata is already a
plural. Don't add an s. You can only do that with operas.
It is true that bonsai need some humidity in the winter, but if the rest of
your conditions are satisfactory, humidity is not as much of a problem as with
other plants. There are a few exceptions. Serissa seems to need rather high
humidity, above 60%. Just remember, humidity trays are a myth.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)