A method for treating keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that it comprises the following compositions: a) a first non-cleansing composition comprising one or more cationic polymer(s) and/or their salt(s) with a charge density of at least 3 meq/g, having a total concentration of surfactants below 3% by weight, preferably below 2% by weight, calculated to the total weight of composition a), b) a second cleansing composition comprising cleansing surfactants at a total concentration in the range of 5% to 50% by weight, calculated to the total of the cleansing composition, and comprising less than 50% by weight, preferably less than 30% by weight, more preferably less than 15% by weight of alkyl sulfate and alkyl ether sulfate surfactants, calculated to the total surfactant amount of the cleansing composition, c) optionally a third cleansing composition comprising cleansing surfactants at a total concentration in the range of 5% to 50% by weight, calculated to the total of the composition, wherein the compositions are applied in the following order: i) at first applying to keratin fibers the composition of a), rinsing it off, at second applying composition of b) with a time delay of maximum 12 h upon application of a), rinsing it off, and optionally at third then applying the composition of c) followed by rinsing it off, ii) at first applying to keratin fibers the composition of a), at second applying the composition of b), rinsing-off the compositions a) and b), and optionally at third applying the composition of c) followed by rinsing it off, iii) at first mixing the compositions a) and b) directly prior to application onto keratin fibers, applying the mixture to keratin fibers and rinsing-off the mixture, and optionally at second applying the composition of c) followed by rinsing it off. a) a first non-cleansing composition comprising one or more cationic polymer(s) and/or their salt(s) with a charge density of at least 3 meq/g, having a total concentration of surfactants below 3% by weight, preferably below 2% by weight, calculated to the total weight of composition a), b) a second cleansing composition comprising cleansing surfactants at a total concentration in the range of 5% to 50% by weight, calculated to the total of the cleansing composition, and comprising less than 50% by weight, preferably less than 30% by weight, more preferably less than 15% by weight of alkyl sulfate and alkyl ether sulfate surfactants, calculated to the total surfactant amount of the cleansing composition, c) optionally a third cleansing composition comprising cleansing surfactants at a total concentration in the range of 5% to 50% by weight, calculated to the total of the composition, i) at first applying to keratin fibers the composition of a), rinsing it off, at second applying composition of b) with a time delay of maximum 12 h upon application of a), rinsing it off, and optionally at third then applying the composition of c) followed by rinsing it off, ii) at first applying to keratin fibers the composition of a), at second applying the composition of b), rinsing-off the compositions a) and b), and optionally at third applying the composition of c) followed by rinsing it off, iii) at first mixing the compositions a) and b) directly prior to application onto keratin fibers, applying the mixture to keratin fibers and rinsing-off the mixture, and optionally at second applying the composition of c) followed by rinsing it off.