Your skincare routine can make or break your lash extension retention. While professional application and regular fills are key, using oil-based cleansers, heavy creams, SPF near the eyes, and harsh acids can weaken lash adhesive, causing premature fallout. This guide from Lashes by Shigeru outlines the top skincare ingredients to avoid and how to build a lash-friendly beauty routine. Learn how oil-free products, gentle cleansing, and a lash-safe serum like Shigeru's prostaglandin-free formula can support both healthy skin and long-lasting lashes.