Thunderchild, As others have said check that everything is ok with the mount.
If there are no problems try this, its called Super Lube it is a synthetic grease made in the U.S.A. Don Whiteman from Bintel recommended this and it works very well. Temp range -43C to +232C.
It won't collect dirt and so keep mechanisms working effeciently. It's good for anything that moves. Cheers, John
