The skincare habits that feel the most diligent are often the ones doing the most damage. Over-cleansing, layering incompatible actives, applying products to a disrupted pH environment, and storing formulations incorrectly — these are mistakes made by even the most skincare-savvy consumers, every single day. The result is a compromised skin barrier, reduced efficacy from expensive products, and a cycle of irritation that's difficult to break. Dr. Yuki Tanaka reveals the most common ways people unknowingly sabotage their own skincare — and the science-backed approach to finally getting it right.