So how do these actually work? Its come up a few times with the discussions about door gaskets, and now I'm really confused which doesn't take much. My free standing Quad Castile a few years old has gasket on the two sides and the top, I always assumed the wash was on the bottom side of the door where no gasket is. I go to my Mom's who has her second Castile insert (first one had issues, another thread last year), and gets replaced. I thought I remembered her first stove having door gasket on the bottom and two sides, I check her new stove this last weekend while visiting. Bottom and two sides. I called a friend who also bought a free standing Castile last year, the same, bottom and two sides. I asked my neighbor who bought a Castile at the same time I did, top and two sides. What gives and how can you tell where gasket should be in reference to the airwash, and how do they work?