3 Answers

Take it to a really, really good dry cleaner. They can take the yellow out.  

I generally do the laundry in our house, the wife works and I'm retired. In good weather I'll hang laundry outside on occasion. My neighbor (A woman) approached me one day and said "How do you get your whites so white"? I laughed my ass off, that was actually a line in a TIDE commercial years ago. I explained to her that I put a quarter cup of "Calgon" dish soap in the wash along with the regular detergent and bleach. She tried it and the difference in her laundry was clearly visible. I got a great meal out of sharing that with her. Try soaking a small area with a solution as described, I love beef stew by the way.

dolly blue mi gran used