This funny looking block is a bit hard to find, but worth checking out when you are in the area. The boulder starts hanging on two pockets followed by some cool moves on slopers with heel hooks.
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.