if you can not see a little screw on them, then they are just pushed on"so you just get a flat knife "not a sharp one"slide it in the back of the knob and prise the know out a little at a time at the left and right of the knob, once you take one off you will see how they come off, just put them back with the 0 up at the top as you know , and push the back in , well thats how mine work ,,
h
January 2011