Insulating material to improve thermal stability?
You agitator, you.
Honestly, once you pull the choobs to put in your inventory, I don't see much difference there in how one would handle it vs the one full of furrzz in prior pix; just spray the effing thing with simple green and hose it out.
After that, scrub surfaces with toothbrush/favorite sanitizer (wear gloves and a mask, if it makes you feel better), then let it dry out for a month near a heater vent and see iff'n it still reeks.
My primary concern would be to make sure I got all the corners hosed out and inspected to be sure no roach eggs before I brought it inside.
mnem