Hello all, I have a Waltham 12s 17j I’m tinkering with. It came to me not working at all. In addition to the setting spring missing (which I had another from a broken movement to replace it with), it was covered in green oil / grease. After cleaning the movement and lubricating, everything appeared to be working properly, until I tried to wind it up. Endless winding and no run. I opened the barrel and found it was covered in that same green oil residue. (Yes, I should have done this sooner but was waiting on the mainspring winder to arrive.) The end of the mainspring has become unattached to the barrel arbor, but does not appear to be broken. I believe the two parts should come back together easily. My thought is that the green stuff needs to go. My question for you all is, what is the best way to clean the mainspring without damaging it? I believe it’s a blue alloy one, but am not entirely positive on this point. Additionally, what would you recommend for lubricating it? Could you please describe the process? Thank you!