K.C.
Hi A.,
It's funny, I just asked this same question about 5 months ago. And, I am on my second child and didn't have this problem with my first, but my daughter also has a dairy intolerance. I never made that connection, so thank you! Anyways, what other moms recommended to me was to soak the grease-stained clothes in Dawn dish soap. It worked like a charm! I couldn't believe it. Maybe it will work for the yellow stains too. Good luck!