What is the effect of hot water and salt on washing sheets?

The water temperature should not be too high, and it is best not to burn your hands. After washing, you can shake it out to dry, and then shake it when the sheets are half dry. When we were young, we had a method, that is, after washing the sheets, we washed them with rice soup and then dried them. After drying, they are fresh and not wrinkled at all.