The Greased Lightening didn't work either. My next step is Dawn Liquid. I think I may try rubbing it in with an old toothbrush. If all else fails I guess I can get some white fabric paint or a white marker and go over it. At least it would be less visible. I did find where the grease came from. There's an open area above where the presser foot comes out and I guess in bunching the fabric up to sew it must have rubbed against it. Now that I know where it came from I'll be more carefull next time.