The key for me was moving the right heel to the front of the ledge to reach the sharp holds, and swinging my right foot around to lead on the way out of the roof.
Rain sucks, but broken holds suck even more. Remember, never climb on wet rock in Fontainebleau.
The sandstone becomes brittle, and pulling on it will ruin classic problems. Drying it doesn't help, because it's still wet and weak inside.
All you can do is wait for better conditions.