This is the heating element, removed. It's basically a hollow aluminum horn with a fan and a heating resistor inside.

It was quite clean inside, but I decided to open it anyway, while it was on my table. It was really not necessary as you can see from the pictures.

If you decide to go for it, be careful when separating the shells, and also be careful not to overtighten the screws when reassembling it, as the body is made of aluminum.

I really put the pictures here only for the sake of completeness.