Warm water cleaning. It can be washed with warm water, and the wormwood pad should be dried frequently to prevent mildew and bacteria, so it can be washed with warm water. Artemisia argyi is a perennial herb or semi-shrub of Artemisia in Compositae. The taproot is obvious, slightly thick and long, with many lateral roots, and the underground rhizome lies horizontally; The stems are solitary or few, and the plants are fragrant.