windshield wiper gaskets replacement

Don"t know if I can explain this well enough,but I'll try.The clip does not come off,when the arm is on the "clip" captures the knurld end of the shaft try to pry up on the clip so it will pull away from the knurld end of the shaft while trying to pull up on the wiper arm. If the arms have been on for awhile it will be difficult to pull them off.Hope this helps and good luck.Mark