rub a bit of furniture polish into the joint or oil. century actually recomend using undustrial grease.
obviously wipe off any excess. this will alow your joints to slip together easily. i also rub a little spit onto the joint before assembly.
carbon is very abrasive and the above will greatly reduce the amount of wear you get on the joint. try not to twist a joint once assembled as this can also lock it. align the eyes just before its put together tight.