I was "cured" for 3 months when I was 30. Happened again for 6 weeks when I was 36. And then 2 weeks at 38. No idea why. I tried journaling to find a common link but no pattern. When I say I cured, I don't mean speaking was easier, I mean true fluency. Zero blocks or ticks. I could still feel where the blocks were supposed to be but they would just give way, like a pair of salon doors swinging open at the slightest push. Something I had NEVER experienced in life. I'm grateful for the times of fluency but I don't expect them to come back.