Using this lip definer is easy. First, gently pull out the pencil until you have enough product exposed. Then, outline your lips starting from the cupid's bow and following the natural shape of your lips. For a more precise look, take your time and make slow, steady strokes. When you're done, you can fill in your lips with the definer or apply your favorite lipstick on top. Remember to keep the lip definer away from high temperatures as it can cause the cream formula to melt. Also, if you have sensitive skin, do a patch test on a small area of your skin first. To maintain it, just keep the cap on when not in use to prevent it from drying out.