I have an orchid that has been quite happy all summer but in the last month its flower petals have gradually started to dry up and fall, and the stalks to both flower heads have turned a woody/yellow colour (see attached picture). I water it every two weeks and have now moved it to a sunnier position (it was previously in a relatively darker, shady spot). I have given it orchid food a few times but only started doing so after it started drooping.
I would very much appreciate any hints of how I can bring it back to full flowering health, or whether you think I am fighting a losing battle.
Thankyou in advance!