My home crag is Kjugekull in Sweden and we climb on granit. Being short means I need to find intermediate crimps, hence my style is strong crimps and compressed moves. I am not very dynamic. I log on 27 crags.
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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.