How can I troubleshoot the touchscreen in my Audi A7?

I recently noticed that the touchscreen in my Audi A7 is not responding properly. Sometimes it takes multiple taps to register my input, and other times it does not respond at all. How can I troubleshoot and fix this issue?

First, try restarting the car's entertainment system. If that doesn't work, make sure that your fingers are clean and dry before using the touchscreen. Dirt and moisture can interfere with its responsiveness.