This short overhang is another cool problem from one of my favorite areas. A long move to the lip of the overhang. There is a big hidden hold on the top that help you to top out the boulder.
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.