Mounted Brassavola tuberculata advice

[nanteq]

Got a small B. tuberculata a couple of months ago and I decided to try and mount it.
I Put it on an old branch covered with moss and the whole thing is placed in a small container with water.
I've understood that the Brassavolas don't need a huge amount of water but how often would you advice me to spray/pour water over it. It is placed in an east facing window with some air movement. Does it need some kind of rest during the winter?

Thanks