Hi Guys, it must be G11, "don't want to do what you ask time"

, any way tonight and the previous imaging run, my guiding has failed.
I use PHD and Orion Starshoot Auto Guider, and calibration is fine, and away it goes.
I have changed nothing on the mount and it has been setup like it is for the last 12 months and all has been well.
I suspect that it is the Mount, and I say this as since I have owned it from new it has not been serviced so to speak in regard to the bearings and gears.
Could it be that the lube has gone a bit off and is sticking, or can anyone shed any light on the subject.
Any suggestions would be muck appreciated.
Leon