"The symptoms you are describing relate to cationic build-up, which can be caused by cationic conditioning agents that might be present within your products. Therefore, you might be missing a strong surfactant in your routine, such as sulfate, that would help to remove this product build-up. Cationic ingredients include: - Stearalkonium chloride - Cetrimonium chloride - Cetrimonium bromide - Behentrimonium methosulfate - Behentrimonium chloride - Benzalkonium chloride - Cinnamidopropyltrimonium chloride - Cocotrimonium chloride - Dicetyldimonium chloride - Dicocodimonium chloride - Hydrogenated Palm Trimethylammonium chloride - Lauryltrimonium chloride - Quaternium-15 - Quaternium-22 - Stearamidopropyl dimethylamine (lactate, citrate, propionate) - Isostearamidopropyl dimethylamine - Isostearamidopropyl morpholine - Wheatgermamidopropyl dimethylamine - Behenamidopropyl dimethylamine - Polyquaternium-xx To remove these ingredients use a shampoo containing any sulfate, for example:  - Sodium Lauryl Sulfate - Ammonium Lauryl Sulfate - Sodium Coco-Sulfate - Sodium Myreth Sulfate  C14-16 Olefin Sulfonate is sulfate-free, but is also strong enough to remove this type of build-up!  ​