You could try non acetone nail polish remover. I would test it in a small spot first to make sure it won't melt the hair.
I mean ... I'd also try just the 100% acetone myself, but then I can be a bit of a daredevil with my ponies to my own detriment!
I think some kind of nail polish remover, along with maybe a fine flea comb, might be your rescue here! I'm sure you could scrape some of it out with your fingers alone, but the fine-toothed comb may help get the last little bits out. Best of luck!