Could be dry scales...just like we get dry, flaky skin sometimes....snakes can get dry scales that look grayish and faded. Not sure if that's what you're talking about, but it's one thing that comes to mind when reading your description.


A picture of what you're talking about would help a lot.

What is your humidity like and how are you measuring it? And how do you feed your snake? Do you feed live? Do you ever leave a live rodent unattended with your snake?