I have a wood lid with a built in lights and it has all kinds of mold in it. How to I remove the mold and prevent it from coming back safely? I am afraid of releasing mold spores if I try to scrub it off, but I don't know if just spraying it with either a bleach solution or actual mold killer will be enough. Of course it won't ever come into contact with the water itself, but I'm still concerned about the safety of the fish. What's a safe way to do this? Thanks!!