I am attempting to removed the Defrost Heater from the rear of the freezer compartment and have succeeded with the bottom heater but the middle one from the top coil seems to be impossible to remove without bending the metal shield that holds the cover panel in place?????? Any ideas on how I am can remove the Heater from the area between the top and bottom coils without damaging the framework that holds the cover panel. Thanks for all you can do in helping me out.