Traverse along the lip from right to left. The start is actually around the corner on the right, so don't miss the first move, its quite fun. Exit just before the tree with a mantle.
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.