For stain, I believe those magic sponge (white color High density product from japan) works best, (definitely better than cif, jif whatever).
But if it is oil, then I not quite sure.
Maybe you can use cif first to get rid of the oily stuff, then use the magic sponge to get rid of the yellow color.
Please tell us which is effective after you try. I am sure the magic sponge will be the most effective. I have tried it, stain that cif can't remove, was easily removed by the magic sponge with water (not messy at all). You will be surprise at its effectiveness.