Galeopetalum repot - urgent help needed!

[Leafmite]

I am one that always removes the old medium but, when I potted up my new Zygopetalum, I carefully removed the entire rootball/medium block from their old pot, set this in the new pot and filled the pot with NZ sphagnum moss (It is good quality moss and the clear plastic pot has plenty of holes for good air circulation). These roots crack and break far too easily so it just isn't worth trying to remove the old medium.

I am growing mine indoors so I need to be careful not to get water on the leaves as there is not much air circulation.