NEFF oven B3ACE4HNOB, Bought August 2020. Good oven and cooks well. HOWEVER, the slide and hide door is constructed with 3 layers of glass and when used for roasting, fat condenses and leaks down between the layer, staining the front and inaccessible for cleaning. The door has to be taken off and dis-assembled, which is a difficult task requiring tools and much reading of the manual. It takes about 30 minutes to do this, noting warnings about possible damage. The engineer who attended when I reported it as a fault was well aware of this problem and advised us to apply masking tape over the vents at the top edge of the door. The manual stresses that these vents should not be covered. I am very unhappy about carrying out this procedure, which seems to be a clear design fault, and I don’t want to do it each time we cook. A £800 oven from a leading manufacturer should not be on the market with this flaw. I would NOT recommend this oven for this reason plus the apparent disinterest of NEFF. I think all or most of their models have this feature.