Typical Bleau-style mantle. Feels impossible until it suddenly doesn't. Great way to test your mantle skills, it's low to the ground so you can try it over and over.
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.