If the rails are close to new yet the only way is to push the pins out and clean them. If there wore some driving through water sometimes will free them up. Thats the trouble with some after market rails, they press the links to close together. Or get a get hot brush pile burning and let it burn down and have hot coals, drive through it in a figure eight pattern till the rails get hot then run it through a creek then back through the burn pile then back to the creek, lol just a thought though.