Popular problem just off the path at the start of the area, it may be easier for the short to do this method than the 7a variant with the right hand arete. Stand start with hands lower than seems obvious, and use undercuts and sidepulls to arrive at the good hold on the left arete. Either make a dynamic move directly to the top, or cross through on the crimps.
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.