La Myosine is a really fun, compact boulder problem with some powerful moves. It’s a bit hidden in the first part of the sector, but it’s just of the main path to the namesakes of this area.
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.