Start way back under the roof, and stem your way out through a weird runnel up to the inconvenient holds round the bulge. Beta varies widely, so find your own fun!
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.