FWIW
My experience with our squeaking fireplace went like this
I had to remove the fireplace
Open the area where the flame effects are located
I found a small metal rod wrapped with aluminum foil ( a rather clever little flame effect device
Be careful not to damage or alter the foil setup)
The metal rod was connected on one end to a motor and on the other end the rod was stuck in a hole in a metal bracket
no bearing , just metal to metal
No wonder it squeaked
My first inclination was to apply some hi temp lube
I was concerned about the smell that lube might creat so I used the lube sparingly
Next I was easily able to bend the metal support bracket to better align the effects rod
In fact, Much better than it came from the factory
We used the camper 2 months after the repair with no more squeaking problems
I might have to repeat that process when we start camping again this Fall and Winter
Hope this info is of some help