Popping noises and white dots

[Captain Video]

My Predicta started yesterday to make popping noises which happen simultaneously with the appearence of white dots on the screen. I've been told that this is happening because of the excess of moisture in the air ( it's winter here now, and I live on the beach ). Are these vintage TVs really so sensitive to humid air? If this is true, what should be done to fix this problem? Or are there another cause to the type of malfunction the TV is suffering?