Or simply hold the arrow such that the nock is pointing away from you and, using a sharp knife or razor, “whittle” the nock off. Take a slice, rotate, slice again. It will pop off tout suite.
I heat it up with a cigarette lighter keeping the flame away from the shaft and fletching then pull it off with a pair of pliers the knock will be hot dont grab it with your fingers! this should leave a pretty nice clean taper to glue your new knock on to. if necessary scrape off the glue residue on the taper. i tend to break a lot of knocks when practicing at close range.
