Moth orchid - the flowers hold wilted as if finished blooming. what can be done? I assume it needs to be unmoving headed, but where on earth...

I assume it needs to be unmoving headed, but where on earth and how.
Answers:    Just cut off the spike implicit the base of the plant. It is done for this season.

See source for standard information on caring for phalaenopsis orchids
I other cut orchid stems down to just above first knuckle. That stem does not produce again but a unsullied stem will grow