Disrepair

Hi, I recently swatted a fly that was crawling along my PG279Q, just in an attempt to shoo it away. Unfortunately, it was crawling around the inside of the display, so now I have a permanent black spot on it. I live in the UK, and I don't know whether I have any warrantee or anything. Is there anything I can do to clean it off? It's on the inner side of my display panel.