I’ve seen many posts about Defiant 1975s and people saying it doesn’t come with glass doors. And that if you install glass doors, they would probably blacken up pretty quick with no airwash system. Our 1975 model did come with glass doors. But they do seem to blacken up pretty good with every burn. We’re pretty vigilant about proper burn temps, etc. So, I’m guessing maybe even this model we have that came with glass doors, has no airwash system? No mention of it in the manual, so assuming that’s true. Was just looking for confirmation from an expert, and if there is anything that can be done to keep the doors from blacking up so much? Such a hassle to clean after every burn.