Using this eyebrow tattoo pen set is easy. First, choose the color that matches your hair and skin tone. Then, hold the pen like you would a regular pencil and gently draw the shape of your eyebrows. Start with light strokes and build up the color gradually for a more natural look. When you're done, you can use a clean cotton swab to blend the edges for a seamless finish. As for maintenance, keep the pen in a dry and cool place. Don't expose it to extreme heat or cold. And make sure to keep the pen cap on tightly to prevent the ink from drying out. Also, be careful not to share it with others to avoid cross - infection. If you have sensitive skin, it's a good idea to do a patch test on a small area of your skin first to check for any allergic reactions.