Provided is a method of laundering fabrics in an automatic washing machine having a drum, wherein the automatic washing machine is operated so as to cause it to run through at least one wash cycle and at least one rinse cycle, which method comprises: during the at least one wash cycle forming in the drum an aqueous washing liquor containing a detersive surfactant component and a detergent builder component, the aqueous wash liquor having pH above about 7; contacting fabrics to be laundered with the aqueous wash liquor in the drum; during the rinse cycle, forming in the drum an aqueous rinse liquor and contacting the fabrics with the rinse liquor; and adding to the rinse liquor sufficient acid source to bring the pH of the rinse liquor into the range of from about 4 to about 7.