I adore hoyas. One of mine has a variegated leaf and the bloom is the same as yours only pink. last year every bloom was covered en masse with tiney orange bugs that I could not get rid of. Next time I will try alcohol like you did! But this year not a one.
I totally love a hoya that I found a few weeks ago at Target, the leaves are completely curled round, its so pretty!
Yours looks quite healty, is such a joy when they bloom~!!