Cutting back Orchid

My Orchid seems to have almost finished flowering. I'm down to the last couple of flowers. (see photo)

My question is:- how far down do I cut it back. Advice varies from cutting almost to the base to cutting back a couple of nodes from the flowers. So, what's best to do and when is the best time to do it? Do I cut all the stems?

 

I usually cut each flower stem back to the next node, you usually get another flower stem develop from there.
Doesn't matter when you do it, I do it as soon as the flowers on the stem are finished.