A method of repairing a used electrode device 1 is disclosed wherein the method has the steps of providing a used electrode assembly 1 having an inner conductor 9 with an integral electrode tip 3 encapsulated in an insulator body 8 having an outer conductor 10 and an outer electrode tip 4C; and pressing the inner conductor 9 with integral electrode tip 3 while holding or restraining the insulator body 8 to apply an force sufficient to overcome at least partially the adhesion forces at the mating surfaces of the inner conductor 9 and the insulator body 8. Thereafter by grasping an end 9A of the inner conductor 9 opposite the tip 3 while holding the insulator body 8 and withdrawing the inner conductor 9 from the insulator body 8 the parts can be separated. Then by measuring the amount the inner electrode tip 3 has been burnt as compared to a new tapered tip to establish a cut distance ΔX; and recutting the tip 3 by machining the burnt portion along the tip 3 taper surface toward and into a shoulder 3A of the inner conductor 9 by a distance equal to the cut distance ΔX the electrode tip can be reshaped.