Are you saying a constant 89 degrees? Or 89 percent humidity?

If you are saying 89 degrees, that is good. If it is 89% humidity, then the eggs should start to plump back up soon. I like to give my covered egg bins a little bit of a tilt to one end. That way, if there are drops of water forming on the lid, they will roll to one end and not drop directly on the eggs.

Good luck.