How do you get rid of soap stains?

Question

I just bought a pair of American Eagle sweats for 40$, my sister washed them and now there's what looks like gray/black smudges down the front, that smell strongly of the soap, and feel soapy. I tried re-washing the pants, but it's still there. I'm pretty angry, how do you make these "soap stains" go away?

Answer 1

Spray undiluted white vinegar onto the stains. Vinegar breaks down soap. Gently dab the stains to help the vinegar work better. Spray a little more vinegar and then launder again. The vinegar smell dissipates as it dries.

Answer 2

wash them with more soap in very hot water