When I so a background removal of the green screen color I have this green glow around my head. No matter what I do with the tolerance, softness, and Defringe I am unable to remove the glow around my blonde hair. I have pick different areas of removing the color but has no effect.
I had the same problem. Here is the summary of my findings; - Try to stay way from the green screen, the more you are away, the less green spill. - Put a back light, targeting your head, hair. - If you are using a DSLR camera, try to keep the diaphram around f5.6 I managed to achieve a certain level of success by doing so. Good luck :)