I'm having trouble with my selection tools, including background eraser and color range. When trying to remove an image from a background, I get a 1-2 pixel halo of background left on my selection. I can almost erase it using refine edge, but not without some unwanted damage. Painting over a mask partially helps, but there is still a very visible line. When I follow tutorials, nobody else seems to have this issue. Very frustrating - any advice?