Low mantle problem. You can either use both hands on the upper ledge to mantle out directly or move to the left and use the good hold a bit higher up to mantle out.
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.