If the cotton fibers in cotton T-shirts are exposed to the sun for a long time, the strength will be reduced, the fibers will be hard and brittle, and the cotton T-shirts will lose their hair and shrink easily when washed. Precautions for cleaning:

1. Close-fitting clothes should not be soaked in hot water, so as to avoid protein in sweat stains from solidifying and adhering to the clothes, and yellow sweat spots will appear.

2. The cotton T-shirt must have changed color. When you get clothes for the first time, you should wash them once, soak them in water with a little salt for 10 minutes, and then wash them by hand with soap, which can better maintain the color of clothes.

3. The best water temperature for washing with detergent is 40-50 degrees Celsius. When gargling, you can master the method of "small amount and multiple times", that is, you don't need to use a lot of water to gargle each time; But it needs washing several times. T-shirts should be wrung out after each washing, and then washed for the second time to improve washing efficiency.

4.t-shirt neckline should not be washed horizontally. After washing, it should be gently wrung out and dried in a ventilated and cool place to avoid sun exposure and fading of colored fabrics.