We rent a house that has a castille pellet stove insert. The gasketing was bad so i went to a local stove for the replacement gasket. They gave me the tadpole gasket and said that was all i should need. When the gasketing came off there was the tadpole gasket on the 2 sides and bottom and just a sticky gasket on the top outside. we figured it wouldnt hurt to just put the tadpole gasket along all 4 sides. since changing the gasket i've noticed the glass has gotten really really dirty within a day....should the top not have the tadpole gasketing on it???