Sit start at the right hand end of the boulder and traverse to the left along the lip. Make a move under the nose, and do one of the coolest mantles ever at this grade!
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.