Use in the evening only, after cleansing. Saturate a cotton pad and sweep gently across the face, neck, and décolletage, avoiding the immediate eye and lip areas. Do not rinse. Start with 2–3 times per week, gradually increasing frequency to nightly as skin builds tolerance. A slight tingling sensation is normal. Always use a broad-spectrum sunscreen during the day, as AHAs increase photosensitivity. Patch testing prior to first use is recommended.