Setup: The Maybelline Tattoo Liner Gel Pencil is ready for immediate use. No prior setup is required. If it's a traditional pencil, ensure you have a cosmetic sharpener suitable for eyeliner pencils. If it's a twist-up mechanism, simply twist the barrel to expose more product. Compatibility: This eyeliner is compatible with most eye makeup products, including eyeshadows, mascaras, and primers. For best results, apply eyeliner after eyeshadows but before mascara. Always perform a patch test if you have sensitive skin or allergies to new cosmetic products. Care: - Storage: Store the pencil in a cool, dry place, away from direct sunlight to prevent drying out or melting. - Sharpening: If sharpenable, use a clean, good-quality cosmetic sharpener to maintain a precise tip. Clean the sharpener regularly. - Hygiene: To prevent eye infections, avoid sharing your eyeliner. Always recap the pencil tightly after each use to keep the formula fresh and prevent it from drying out.