It seems that Melissa and I have decided to get all Heloise on you lately. First with this stain remover, and now I'm happy to say that Raise Armpit ($12.50) stain remover does indeed work! It's a slightly embarrassing admission, but I rarely buy white shirts because they will inevitably get those yellow pit stains that are *impossible* to get out. I don't know what my sweat is made up of, but apparently even bleach will not erase the dingyness.
I applied Raise on a white linen shirt that I wore all summer until it became, er, no longer presentable. I followed the directions by applying the liquid to the stain, letting it sit for 15-20 minutes, then throwing it in the wash. I honestly didn't think it would work, but when all was said and done, the unsightly yellowness had disappeared, leaving me with shirt I can proudly wear again. Yay!