I think either I am doing something wrong or its broken...... how do you read it? There is a line there that says to read it at the color that matches here, but that color is white. And the pink part.......when I got it out of the package, it ranged from white on one end, pink in the middle and blue on the right. I know my hum. is greater than zero. I had to wipe off the glass to take a pic!