This not a complaint. I just need advise because the ceiling on my bathfitter is growing a greenish, yellowish film on the ceiling of my new bathfitter. I would like to know what would cause this, and how I can prevent it in the future. I need to know how to get rid of it without damaging the coating on the ceiling. Please respond asap. I don't want more of this subtance occuring. thank you. read full review »