What does the process of cleaning nails before applying polish primarily ensure?

The process of cleaning nails before applying polish is crucial because it ensures that there are no contaminants or oils present on the nail surface. This step is essential for proper adhesion of the nail polish. If there are oils, dirt, or other residues on the nails, the polish may not adhere effectively, leading to chipping or peeling shortly after application.

By removing these contaminants, the nail surface becomes clean and ready for polish, allowing for a smoother and more durable finish. This preparation is critical for achieving a polished and long-lasting manicure, as it directly affects the overall outcome and wearability of the polish. Thus, proper cleaning is foundational for any professional nail care practice.