Currently sitting in O'Briens and the tech came to have a chat. Showed me the genuine LR trim clips, and said "basically out of the factory is the only time these bloody things seal properly, so we put a smear of urethane sealant on them as we install them or we find they tend to weep water in over time".
He said they take a little more effort to remove this way but they never leak. Time will tell I suppose.

