Brown spots on Odontocidium leaves

[Austin Powers]

I have had this Odontocidium Wildcat for a year now. It has been growing(well I think), and is currently in spike. What could be the cause of the brown spotting on the leaves. They have been there for as long as I can remember, although I cannot say if the plant came that way(I suspect not). I had been misting the foliage until recently then read that oncidiums are not fond of wet foliage. Otherwise, medium fir bark, regular fertilizing with Dynagrow, good light in a west window.
Thoughts, comments, suggestions appreciated.
Thank you,
Stephen

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[Toddybear]

Been there, got that! Not sure what it is but my plants go downhill rapidly. I'm waiting to hear what others have to say about it.