T-shirts should be washed like this:
1. Wash with water below 30 degrees to avoid scalding with hot water.
2. When washing, don't use washing liquid with large alkaline components, and it is best to use washing liquid specially used for washing silk or cotton. Such as silk wool detergent.
3. Don't soak for too long
4. Be sure to turn it upside down when washing, don't rub it hard, be gentle.
Remember not to be exposed to the sun, just dry it in the shade. Don't hang it with a hanger when drying. It's better to dry it flat with a special hanger.
6. Be sure to wash separately from other clothes when washing.