Been there more times than I would like to admit. Anyone who works on OTR trucks has stories of the nasty fucking shit found in the bunk or under the beds. Pre-smart phone era, vhs porn tapes and magazines, dildos that would make a whore scream. Some truly nasty shit and disgusting conditions overall.
We did not work on anything in the sleeper and my techs did not enter. Occasionally, we would call a driver and have him move the vehicle in and out of the shop, test drive or anything that required getting in the cab. I have called companies and told them the cab needed to be cleaned before we would work on anything inside.
Nasty doesn't begin to describe it.