Safety-Kleen goes around to all the gas stations and provides them with a machine that washes greasy auto parts. This saves auto mechanics the time and trouble of scrubbing the parts by hand in a pail of gasoline, and gas stations gladly pay for the service. Periodically the Safety-Kleen people come around to remove the dirty sludge and oil from the machine, and they carry the sludge back to the refinery to be recycled. This goes on and on, and you’ll never see a miniseries about it on network TV.
