It is often necessary to remove sweat or perspiration stains, as day after day, cleaning after cleaning, the fabric evolves and gets more easily stained by these body fluids.
If it is not possible to rinse these stains immediately with warm water, they can be removed by dabbing them with a cloth soaked in white vinegar or slightly diluted ammonia.
You can also dab the sweat or perspiration stain with a cloth soaked in hydrogen peroxide.
On a wool fabric, water mixed with white vinegar is recommended.
On a delicate fabric, wipe the sweat stains with a cloth soaked in lemon juice diluted as necessary. Let dry. Then wash.
If the garment is discoloured by perspiration soak it as quickly as possible in a mix of one part water to one part white vinegar.