What to use to clean ceramic coated manifold?

[4g63tcrazy]

Well my FP manifold, turbo and o2 housing are all ceramic coated black and I was wondering what to use to clean them? Some water had gotten on them and it leaves spots. I tried a few cleaners but not sure what to use since I don't wanna take the coating off. I also noticed I got a little mud splashed up onto the manifold from the other night and it doesn't look like it wants to come off very easily..