This quick-drying problem can absorb a lot of time. Its harder than it should be for 6a, but well worth the effort. Watch out for the ledge on the right, technically it's not allowed. You may need an extra pad for the start if you're sub 160cm
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.