Hi Everyone, My rear doors are starting to develop the dreaded check strap squeak. The hinges are fine and well lubricarted. (The Check strap is the device that stops the doors opening too far and makes them hold positions) I have tried cleaning them with WD40 then applying new lithium grease. Anyone got any suggestions on making them run smoother? I wonder if using silicone or a more plastic friendly grease may be the problem?