You didn’t say what color of carpet you were working with . . . guessing light colored like off white or in that family of colors. I agree with all of the above. The other offering I have is de-color. It’s in our carpet dying kits. I would do this under a controlled situation. Apply a very small amount on a very small area. Leave on only long enough for it to do it’s work, then rinse and extract. If it works on the small area, then proceed to the rest of the stain. Good luck.