Some of my t-shirts, especially the lighter colored ones, get dark stains under the arms from my deodorant and/or sweat. I've had one shirt in particular less than a year and it's almost unwearable. The stains smell slightly of my deodorant and have a different texture than the rest of the shirt. I wash my clothes in cold water most of the time. Does anyone know a way to get these stains out? I really love some of these shirts and they aren't available to buy anymore.
PLEASE READ: Do not answer with "wash them" or "buy new shirts." If it was that easy, I wouldn't be asking this question.