Non-ionic conditioning agents may be polyols such as glycerin, glycol and derivatives, polyethyleneglycoles known with trade names Carbowax PEG from Union Carbide and Polyox WSR range from Amerchol, polyglycerin, polyethyleneglycol mono or di fatty acid esters having general formula R20 CO (OCH2CH2)n OH R20 CO (OCH2CH2)n O OC R21 where R20 and R2i are independent from each other saturated, unsatur