Here's the fast and easy on TV and computer LCD screens.
First, you should never use liquids such as Windex directly on these screens.
Second, you shouldn't use paper towels or harsh wipers as they can scratch the sensitive screen. Opt instead for a soft cotton washcloth or a dry Swiffer.
Just try to wipe the dust off but don't press to hard.
If you must, make a light solution of rubbing alcohol and water and apply it to the washcloth. Gently rub the screen.
Good luck not ruining your electronics :)