Den. Somkiat blue

I purchased this orchid in April of 2023 in bloom with a spray of beautiful blue blossoms, but it has not flowered again since then. It's in a south-facing window, on the side that receives unfiltered light, with two phals for company on the filtered side, who bloom so faithfully I could almost set my watch by them! I water it, lightly fertilized, several times weekly as it is in a small pot and dries out quickly. The window is over my kitchen sink, so there is higher humidity. It's cool in the winter and warm in the summer as it's a metal casement window.
What does it need that I haven't provided?   Thank you for any help you're able to give!