I've just moved into a place built in the late 90's and the kitchen rangehood releases a greasy/buttery smell when it's on.
I'd like to get rid of the smell before I cook in the kitchen and use the rangehood. I think it doesn't vent anywhere - it has rectangular mesh filters and when those are removed, it looks like the pictures attached. I've cleaned the filters and as much of the external parts of what's in the pictures as I can. I think there must be extra grease build up in the area up inside which I'd like to take apart and clean as well.
Any advice on taking the rangehood apart safety to clean inside? Apart from switching off the power plug.
Can anyone help me identify the part(s) pictured in the picture?

Also, is there such a thing as a carbon filter that I can simply insert above the rectangular mesh filters for an extra layer of filtering, so oil doesn't build up up inside the part pictured?