Loosen the 3 screws that secure the handle. Slide off the plastic tube. Inside the pipe, the quartz glass and heat insulation is installed. Loosen the clip securing the heating element to the base of the hand-piece and slide out the heating element. Insert new heating element and reconnect the thermal sensor wires, use heat-shrink-tubes to avoid shorting of thermal sensor. Be careful not to rub Heating Element wire. Reconnect the ground wire after replacing the element.its components. Assemble the handle again.