Driver responsibility with the cleanliness of issued trucks?

I always wash my own truck, usually at home, in the driveway. That's because the owner/company doesn't want to pay for a wash more than once a month. I don't mind one bit washing it, guess because I'm a clean freak. I even polish the wheels/tanks on my own time. Oh, and I also wash the trailer, by hand. You see, I like a nice clean truck to drive down the interstate. And inbetween washes, there's usually a hose at a Pilot/Loves fuel island that I take advantage of and get the dust off, that is if there is no one waiting behind me to fuel. Sometimes, you can find a coin-op wash bay that can accomidate a truck, plus I always carried a 25' garden hose and soap and brush. Oh, BTW, I am 63 years old.