Tactile screens tend to gather fingerprints at a very high pace, so I clean mine with a wet tissue every few days.


  • If I clean my screen when it is locked, the background is not dark enough so I can't clean perfectly.
  • If I clean on a black terminal, the tissue clicks the tactile screen everywhere, which is dangerous.
  • Switching off could be an idea, but closing all apps (VMs, terminal, etc) + rebooting + relaunching the apps takes incredible time and is very inconvenient, I must avoid that.

So I need a program that:

  • Makes the entire screen black
  • Does not react on clicks
  • Free and open source
  • Works on latest Ubuntu


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