Does your controller board support a SCREEN WIPE option (a command or API that temporarily disables the touch sensitivity and allows the user to clean the screen)?

There are several ways to do this – all touch can be disabled, but it would be easier for the host to blank the screen, make the entire screen a hotspot (touch-sensitive region) and display a countdown number that gets reset when the unit is touched. When cleaning is finished, the screen will no longer be touched, and the host can resume regular operation.