


The best way to clean the screen is with a damp lint-free cloth but do not apply liquids directly to the screen as it could cause problems if it were to get inside the Surface case. Is that atomic wing sauce or pizza sauce smeared on the screen? In either case, it can screw up the ability of the screen to pickup touches accurately or maybe even at all (although it’s not likely) so get rid of it! Troubleshoot Surface Touch Screen Issues: Clean the Screen
