Using your Crestron 7 - inch touch screen is straightforward. Just tap the screen to navigate through different functions. However, be aware of the current issue where you might not be able to do a factory reset due to the login and passcode blocking access. To avoid potential problems, always keep your passcode in a safe place. When it comes to maintenance, use a soft, dry cloth to clean the screen. Don't use harsh chemicals as they could damage the touch - sensitive surface. If you face the factory reset issue, you may need to contact Crestron's support team for further assistance.