ol having about 12-16 carbon atoms; B. about 0.25-0.30% by weight of an alkyl dimethyl amine oxide in which the alkyl group has about 12-16 carbon atoms; C. about 0.30-0.40% by weight of a quaternary ammonium halide having the formula ##STR2## where R1 and R2 are methyl; R3 is methyl or a phenyl-substituted alkyl group having about 8-12 carbon atoms; and R4 is an alkyl group having about 12-18 car