And a final update in the event anyone searches for this Fluke or Philips series:
The gears inside are just hard plastic and rough, and fitted about as well as the gears in a kid's toy. It must work, but wow, the engineers didn't think of this? If I had the 3d printing skills it would be cool to fashion a mod, but I don't.
If you are worried about this noise, it's a way it's built. I put a bit of watch oil on the gear but it did little to nothing.