The crux is to get off the ground using the inverted 2 fingers pocket, but if you have thin fingers you can fit 3 in the pocket which makes it considerably easier problem.
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.