Well, how do you describe this thing? You sit start under the 3 giant holes, and wriggle your way in and out with various knee and arm bars until you get to the lip, then, the standard beta offers a pretty cool, but committing mantle. OR... spin round and go feet first :-)
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.