How to wash the sheets in general hotels?

The key is water quality. The water quality is not good, and it is useless to add any amount of washing powder. Don't always think about bleaching, cotton things, bleached many times, seriously damaged, will soon rot. Adding more water softeners is the last word! ! Or you can use whitening washing powder, first melt the washing powder with hot water, then rub the sheets to be washed with water and put them in hot water with melted washing powder for minutes, and finally wash them with a washing machine. After this process, you will be surprised to find that the washed sheets are as good as new. I don't know.