Isn't that the truth. I've worn gloves and put seat covers in cars to protect me. Some cars are the most disgustingly filthy things inside. I may not wash the outside of my old trucks very often but the interior is clean.
In one of my former careers working as a mechanic and autobody tech, the worst vehicles to work on were the ones that people lived in... wanna talk about disgusting filth and a sad view on humanity!
There were times I had to work on vehicles with the "occupants" still inside while making repairs because this was their "home", but when your not the Boss you have no choice, sh!t like this probably wouldn't fly nowadays in a shop because of regulations/liability/insurance guidelines