On the model I have (which has no access in the back except for the bulb portion on the bottom) I've removed every screw I can find, and then (from the front, I had to remove the glass panel. Then I had to pull a cardboard-like, dark-colored backing forward to see the steel rod that turns behind the flame that is causing the squeaking noise. Now I just need to dust it out and oil the steel rod and hope that stops the annoying squeaking. Use a flashlight, which helps you find the screws. Some are on the sides of the front and are hard to see on my model.
Sandy, January 2014