The top door on my Viking Jr. has a plate on the back side that sandwiches what looks like fibreglass insulation between it and the door. It's pretty deteriorated and I am going to replace it. Could this be asbestos or is it just fibreglass insulation? If it is asbestos, would it be OK to replace it with fibreglass? I'm not sure if this is factory or if the previous owners added this for some reason. Thanks in advance.