OMG, what do you downstairs to get the temperature up in the 90s?? lol
I would think mid 80s might be plenty warm? You might want to try lowering the lower end even more and see if that does anything?
That lower range is for roth but maliopense takes it down to near freezing or slightly lower in the wild although that isn't necessary to bloom.
Just a thought if you're going to torture this thing.
My first HK bloomed on my windowsill where the winter night low is around mid 50s to 40s depending on the weather outside. During the day, it would be fluctuating between low 60s to low 80s, low 80s being the midday max on sunny days.
It bloomed again on the subsequent growth in less than one years interval. I eventually tossed it as the flowers were meh and I needed space for other stuff.
One of my paph friends bloomed a very nice HK bought from Orchid Inn a couple of years ago.
His temperature range is even higher than mine.
What I mean to say is that these hybrids will bloom when they want to bloom. Many won't ever bloom. Few plants will bloom on a regular basis.