Well named problem! Trying to work out what is in, what is not, and where to go when you get to the top is more than half the battle of climbing this problem. There is a photo on Bleau.info that shows a red line to the left across which you are not meant to cross. This cuts out the arete at the start, including the slopey hold just inside the arete. there is a crucial crimp up and right at the top that needs to be in good condition, otherwise it makes the problem seriously difficult :-)
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.