I lost a a Dendrobium Antennatum Antelope to a fungal infection recently. I seperated, disenfected entire area, and used an anti-fugal. The problem with that one was at it's crown and roots. i had hoped i found it early enough to prevent spread. I have a flowering Odontocidium Sunny Daze ‘Hilo Bay’ that has developed white spots on the flowers and are drying out after only blooming for about 2 weeks. The base is developing a "shadow" look to them. I've once again isolated it and treated it again. Any advice? 
