How to clean cotton and linen slippers?

Cleaning method of cotton and linen slippers:

Pour a proper amount of washing powder into the basin (washing powder should be washed with hot water first, then with cold water).

Brush the bottom and sides of cotton slippers with tap water, then stand the soles up and soak the uppers in the water facing the washing powder. Soak for 3-4 minutes.

Wash with water for many times, not only the vamp, but also the inner side of the shoe, otherwise the emulsion powder left behind will make the shoe hard.

Dry the washed shoes in the sun.