"Do not lubricate servos," a small print reads in a back water place inside my Spektrum DX6i owner's manual.
Here on the Gulf Coast where salt in the air oxidizes aluminum and maybe plastic it's so heavy, this is not really an option. So, do you lubricate your servos and, if so, what do you use?
I use a tiny drop of LPS-1 on my tiny ParkZone micro servos, applied with a Q-tip right at the shaft insertion. I also hit the little rail inside the track with it. I have not had a failure, or a fire, yet.