The easiest way to clean the capillaries is to disconnect the air line from the bottom of the manifold, squirt 2 cc of isopropyl alcohol in the air line, reconnect the air line and turn on the air pump. The alcohol will be forced thru the capillaries. Move the arm slowly back and forth and you will feel it gradually loosen up at the end of its travel. Putting paper towels at both ends of the manifold to catch the drip is not a bad idea. Doing this every six months kept my arm moving freely. If I didn't do it regularly the arm would get stuck in the groove and skip at the end of LPs.
One of the joys of having a linear tracking arm is no inner groove distortion.
One of the joys of having a linear tracking arm is no inner groove distortion.