The inner glass face has liquid that leaked in and cannot be removed without dismantling the oven door but there does not appear to be any screws to take the front of the door off to get at the glass inside for cleaning

Ian Thomson, December 2011

you need to take the door off. There are 2 clips on each hinge. pull them back fully, push the door so that it's almost closed (the clips will stop you from closing it fully)and slide the door out. Be careful as the door is quite heavy. Lay the door down flat and you will see the screws on the bottom of the door.

John Whelan, May 2013