DIAGNOSIS The anti-reflective coating on the OLED panel is delicate and can be damaged by standard glass cleaners, alcohol, or ammonia. Using them will create permanent streaks or matte spots.
FIX Power off the TV and let the screen cool. Use a dry, soft microfiber cloth designed for lenses or screens. Gently wipe the screen in a single direction using light pressure. For stubborn smudges, slightly dampen a second microfiber cloth with distilled water only. Wring it out completely so it is barely damp. Wipe the area, then immediately dry it with the first dry microfiber cloth.
IF THAT DIDN'T WORK For adhesive residue or oily fingerprints that water won't remove, use a specialized screen cleaning solution that is explicitly labeled safe for OLED/anti-glare coatings. Spray a tiny amount directly onto the dry microfiber cloth, never onto the screen. Test on a small corner first.
HEADS UP Never apply pressure to the center of the screen. The panel is thin and flexible. Always support the area you are cleaning with your other hand placed flat against the back of the TV to prevent flexing.