Why do laundry detergent is so good, still use detergent?

Why do laundry detergent also sell so well? Production of the manufacturers or so much? Including soap. Said that there is a reason, although the laundry liquid as well, but on the price it costs a lot of, often under the condition of same weight because it will be one to six times more expensive price. So many families still do not have the habit of use the laundry detergent. Tags: laundry detergent packing machine laundry detergent washing powder making machine washing powder production machine production factory house, the previous: washing machines wash clothes, washing powder and detergent which more appropriate?