I am not an expert on the OW thing. Puppydogtails I think is the expert from what I hear. If there is an OW then you really need to go dark. If you suspect it is a MLC I can give you links about that. Depression is one of the main ingredients of a MLC. It is not a quick fix. MLC can go on for up to 10 years.
One last thing If you think there is an OW , you are probably right.
