How to troubleshoot a malfunctioning touchscreen in an Audi A4?

I've been having trouble with the touchscreen in my Audi A4. Sometimes it works fine, but other times it becomes unresponsive or randomly selects options on its own. What could be causing this issue and how can I resolve it?

It's possible that the touchscreen is dirty or has a faulty connection. Before taking it to a mechanic, try cleaning the screen with a soft cloth and make sure the connections are secure. If the problem persists, then it may be a hardware issue.