I did everything of me to get 100%.
Enough multi fruit, 60 defence plenty of water
6 top tier clinics.
Taken hours and it went up to 95%.... And stopped. I slept for 24 hours and then another and it went down to 94% before having an arrow beside it indicating up.
I'm on xbox one. It isn't working for me. It's down right annoying now.
I had like 15 Clinics. You need more. And you can't sleep, that doesn't increase it. You have to wait. 60 defense also isn't very much. I had like 150.