Take the rods out, clean the bearings, and something that really makes a difference is to clean the inside of the rods using a gun cleaner. I don't remember what the stuff is called, but what ever it is, it works great. Wrap some gauze around the wire brushes of the gun cleaner, dip it in what ever that stuff is that they use to clean guns and clean out all the dirt and grime inside the rods. You can use the same stuff to scrub the inner rods. Good luck.