To eliminate a possibility of shrink even in the case of woolen clothes and clothes mode of wool-mixed fabric, by improving a cleaning technology of a system in which water-soluble stains are removed by the addition of small amounts of water and detergent to a solvent.

In a prior art, an internal drum 1 is rotated in the direction of an arrow (a) as shown in Fig. (A) and clothes are tossed upward and tumbled downward as indicates by an arrow (b), therefore washing is enhanced by rubbing action and striking action, which, however, causes the clothes to shrink in the case they are woolen. To counteract it, rotating speed is increased to such a degree that the clothes to be washed are rotated (in the direction of an arrow (c)) together with the internal drum as shown in Fig. B, and an intermittent rotation such as rotating for dozens of seconds and stopping for several seconds is carried out, thereby mutually moving a large number of clothes loosely and slowly and producing a stirring effect. Thus, the cause of shrink by rubbing and striking can be prevented.