Hi, can anyone let us know how to get this out to clean? We think it is a baffle plate. It is VERY heavy. You cannot lift it up as it seem to be resting on the side bricks and has metal grooves (thin rail) above the sides. We live in a rural area and called the closest fireplace store and they had never heard of a system like we have. This is an insert, with doors on each side. Thanks in advance for any help!