I removed the housing cover and everything was functioning fine and the shoes need replacement which doesn't seem to be a problem. However, when I took the cover off, it looks like there was a buildup of liquid inside. It was very dark, not oily, and not excessive, just enough to leave a small puddle.

I don't think it was a leak, but maybe a buildup of moisture from the brake never being changed?

They are supposed to be dry aren't they?

I plan to clean and degrease the whole assembly. Is this ok?

Thanks