To use these Ninjutsu Masters posters and prints, first, find a nice spot on your wall where you want to display them. You can use wall hooks or adhesive strips to hang them up. Just make sure the surface is clean and dry before attaching. When it comes to cleaning, use a soft, dry cloth to gently wipe away any dust. Avoid using water or cleaning agents as they might damage the print. Also, keep the prints out of direct sunlight to prevent fading over time. This way, your Ninjutsu Masters posters and prints will look great for a long time.