If you’re like most people, you probably cringe at the thought of cleaning human urine from car upholstery. But don’t worry, there’s an easy and effective way to do it. First, use a vacuum cleaner with a hose attachment to suck up as much of the urine as possible. Then, pour a pot of boiling water onto the area and wait 10 minutes. Wipe down the area with a cloth soaked in cold water and dry off any excess moisture. Finally, apply a coat of car polish to finish the job. ..