To use this Crestron touch screen, first try to power it on and see if it responds. If you face issues during setup, be aware that there's a problem with factory reset due to the login blocking the Setup menu. Don't waste time trying to reset it without resolving this. When it comes to internet connection, since it has trouble connecting, you might want to check your network settings carefully. For maintenance, keep the screen clean using a soft, dry cloth. Avoid using harsh chemicals as they can damage the screen. If the issues persist, it's best to contact Crestron support for further assistance.