Next, remove the plastic cover on the bottom of the gearbox. At this point, old crumbs will be getting everywhere. This is held on by four screws, which are removed in the first picture. At this point, you also need to pull the plastic cover off the lever at the front of the mixer.
You now have access to the lower plastic cover - best to give this a wash along with the felt. (picture 2)
Behold the beauty of the Kenwood gearbox (picture 3). Best not to wash this, but remove the 6 screws to gain access.