Using our Celtic Square Decals is easy. First, clean the surface where you want to apply the decal to remove any dust or dirt. Then, carefully peel the decal from its backing and place it on the desired surface. Smooth it out with a squeegee or a credit card to get rid of any air bubbles. As for maintenance, you can gently wash the decal with mild soap and water if it gets dirty. Avoid using abrasive materials that could scratch or damage the decal. When applying, make sure the surface is dry and at a normal room temperature for the best adhesion. Also, take your time to position the decal correctly as it can be a bit tricky to re - position once it's on the surface.