Hi,
Try using a clean lint free cloth moistened with Isopropyl Alcohol 99%+ (available from electronics parts stores) to gently wipe away the spots.
Ensure that the TV is disconnected from the power and that the cloth is only moist and not dripping as even IPA conducts electricity when wet. At least it evaporates quickly and leaves no conductive residues. This is in case any liquid gets in between the bezel and the screen and somehow reaches a board or cable connector etc.