This boulder is on the leftof red n°14 (La Sortie des Artistes). You start low on the right and exit directly in some balancing moves. Follow with your hands the good edge to the friendly topout. To the right of La Vague (same block).
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.