Sometimes the stains of sweat in a shirt or a delicate pledge not disappear with a simple washing. To eliminate definitely should put the garment in soaking water and add a bit of vinegar or ammonia.
You can also deal directly frotándola with a cloth dipped in white vinegar and water and leaving it to dry.
Another option is to put the garment in soaking with a handful of salt and a generous stream of alcohol. And then, at the washer.
Sometimes the stains left on the armpit to remove carbonate is used with lemon, and left for a few minutes. It can be applied twice a week to keep it clean.
