My last hatch had humidity 90% so don't panic too much. All of mine hatched besides the ones I marked as duds during candling (which I opened up at the end to be sure and none of them ever started developing).
Actually my humidity and heat were really high the whole time and I still had a 50% hatch rate on mail order eggs from ebay.
The ones I have in there now I kept right between 99 & 100 the whole time with humidity around 30 and local eggs & it's looking like my first hatch is going to end up being more successful!
Fingers crossed for you, I hope it works out. How many days in are you?
Oh good! The air cells are looking great I just wasn't expecting this humidity jump! It looks like rain is moving in today. Today is day 19 for me.