How do you treat persperation stains in clothes?

Lemon juice or peroxide and sunshine

This site has several different solutions and instructions on how to do this also:

https://www.rd.com/home/cleaning-organizing/how-to-get-rid-of-sweat-stains/

I would try putting that special under arm clothing area in a saucepan with Bi Carb Soda water and boiling water. Rub the spot hard when it cools a bit.

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sweat stains from white clothing.What you need:

• 1 cup of white vinegar
• 1/2 cup of baking soda
• 1 tablespoon of salt
• 1 tablespoon of hydrogen peroxide
• 2 cups of warm water
• A bowl large enough to hold your shirt and the cleaning solution
• Small bowl
• Metal spoon
• Towel

Pour two cups of warm water and one cup of white vinegar to your bowl. Place the shirt in the water and vinegar solution so that the sweat stains are completely covered, and let it soak for between 20 and 30 minutes.

Combine the hydrogen peroxide, baking soda, and salt together in a small bowl. Then, use the spoon to mix the ingredients together until it forms a paste.

Cover a flat work surface with the towel.

Remove the shirt from the large bowl, and then, wring out any excess liquid.

Spread the shirt out over the towel, use the spoon to spread the paste mixture over the soiled parts of the shirt. Let the mixture sit on the shirt for about 20 minutes.

Once the paste is set in, wash the shirt with a load of whites as you normally would.

How to Get Pit Stains Out of Colored Shirts

You might be surprised to discover that the same process you use to get sweat stains out of white clothing can’t use on colored clothing — the hydrogen peroxide can ruin them.

To remove sweat stains from colored clothing, soak the item in a mixture of cold water and white vinegar for between 20 and 30 minutes. Then, run cold water over the soiled area, and gently rub the area with your fingers to loosen the stain. Then, wash the clothing like you normally would — in a load with like colors.

If you don’t have white vinegar on hand, crush a few aspirins up. Then, mix the crushed aspirin with water to make a paste. Apply the paste to the soiled area, and let it sit for about an hour before washing the piece of clothing in the washer and dryer.

White vinager on the stain soak it let it sit a couple hours it comes out