Using this vanity mirror is easy. You can hang it either horizontally or vertically on your wall according to your preference and the layout of your room. Just find a suitable spot, use appropriate hanging hardware, and you're good to go. When it comes to maintenance, clean the mirror surface with a soft, lint - free cloth and a mild glass cleaner. For the iron frame, you can use a dry cloth to wipe off dust regularly. As for the warning about the nickel content, make sure to keep the product in a well - ventilated area. Avoid direct contact with the frame if you have a nickel allergy. If you have any concerns about the chemicals, refer to the website www.P65Warnings.ca.gov/furniture for more information.