How do I clean my smart TV screen?

Glass cleaner,or vinegar...

https://www.consumerreports.org/tvs/how-to-clean-your-flat-screen-tv/

Cotten cloth, no cleaner unless the cleaner came with the tv.

Pull out your owners manual, or look it up on line if you no longer have it. Tv should be off for at least 15 minutes or so. See if these help.

https://www.samsung.com/us/support/answer/ANS00046181/

https://www.consumerreports.org/tvs/how-to-clean-your-flat-screen-tv/

https://m.wikihow.com/Clean-a-LED-Screen

Put 1/4 cup of isopropyl alcohol and 1/4 cup of water in a clean spray bottle. Shake the solution well.

Spray the solution onto a clean microfiber cloth. Do not spray the solution directly onto the screen.

Wipe the screen with the cloth, starting at the top and along the sides. Use straight, up-and-down wiping motions. Don't press too hard, a light touch is best.

First and foremost, do not use any chemical products on an LCD screen. Especially do not use a common window cleaner (Windex, etc.) or anything with alcohol or ammonia in it. These are going to mess up the protective layer on your fancy TV screen. Windex was OK on the good old tube TVs, but has to stay away from the delicate screens of LCD, LED and Plasma TVs.

Do it before turning your TV on, or make sure to have your TV off for around 15 minutes and completely cooled down before you go to clean it in any way. Otherwise, you’re going to run into evaporation issues with your cleaning solution and notice that it is very difficult to keep streaks from forming. Plus, it’s much easier to clean an all-black background rather with than the jerky movements and colors that most programming is comprised of.

Spraying your LCD screen directly with cleaning solution is not a good plan. The ultimate sin would be to over-use a cleaning solution. Too much liquid usually means streaking. Don’t over-saturate your cleaning cloth either. A few gentle sprays will suffice to make your TV shine like the day you got it out of the box.

Get a bottle of distilled water (no tap water).

Pick up a spray bottle.

Get some microfiber cloth. Stay away from paper towels and any other wood-based papers as they could leave fine scratches on the screen.

Turn the set off and let your plasma screen (or any screen) fully cool down. Hot Screens and streaking usually go hand-in-hand on LEDs, etc.

Fill the spray bottle with distilled water. Spray your microfiber cloth (not the screen).

Gently wipe the screen in a circular motion with the cloth until the screen is clean and dry. There should not be any streaks if you did everything right. Once done with the cleaning, DRY the cleaned area with the drier portion of your cloth.

If water is dripping down the screen into the electronics, you over saturated. Go section by section on your large display, and re-spray the cloth when you find wiping is too dry (rather than soaking the cloth with water on the outset).

Repeatedly the process until you are satisfied with your newly clean LCD screen.

The ONLY products that can be used on a flat screen TV is a clean microfiber cloth and screen cleaner which is a purified, deionized water. You can buy a bottle of it from anywhere that sells TVs.

I use 2 Microfiber cloths ( cloth needs to be clean no fabric softener on it) & distilled water;one cloth a little wet one cloth to wipe it dry