Sorry I didn't see this last year. I got an unbloomed mericlone at our April show. It finished its first flowering a few weeks ago.
Keep in mind it's easy grow and should recover.
It has the classic look of an underwatered Oncidium hybrid. It shouldn't ever go dry completely. When pushing a new growth, or in spike, it needs to stay moist. You can't go by the calendar, and in a sunny window it will use more water.
They grow better with fertilizer. I don't know what you've been using. For Oncidiums I use 20-20-20 with micronutrients at the rate of 1/2 teaspoon per gallon at almost every watering while they are or could be making new growth. I have a sunroom where they will grow all Winter, so I fertilize all year. If they slow down inside your home, I would fertilize maybe once a month until it warms up.
Just cleaning off scale may not get rid of all of them. Examine it carefully with a magnifying glass. If it has scale it won't grow well. Look down into crevices.
I wouldn't give it so much light unless it were completely healthy, with a large root system.
I think if you make sure it's scale-free, give it a little less light until it bounces back, and water it more, it will turn around and recover.
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