We have owned our Bosch range for four years. During the first year we noticed there was dust in between the glass in the oven door. There is no visible opening where we could see how it got in there and there is no way for us to access it to remove it. It's kooky looking and not what you want see as you check out the roast in the oven. The vendor referred us to Bosch and Bosch advised us to get an independent tech. This obviously occured at the factory so we do not see why it should be our expense. It's devalued our "top of the line" kitchen.