A not often repeated problem, maybe because it’s easily overlooked with all the other great lines around. Probably one of the hardest 6a+ I’ve climbed. Powerful physical moves with small compression positions. It proved to be quite the puzzle!
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.