. . . "In accordance with one aspect of the present invention there is provided a composition comprising, by weight, from about 0.5% to about 10% of a surfactant selected from the group consisting of polyhydroxy fatty acid amide surfactants having the formula: ##STR2## wherein R1 is H, methyl, ethyl, propyl, butyl, 2-hydroxyl ethyl or 2-hydroxy propyl; R2 is a C5 -C31 hydrocarbyl; and Z is a polyhydroxyh" .