Then rinse under running water. In a public restroom, if you dry your hands with a paper towel, you should also use the towel to shut off the water and open the door.
VOA: special.2010.09.29
Then gargle afterward to rinse out the soap taste.
"We effectively use it to rinse our mouth three times and then spit out, " explained Daniel Limonadi, the Curiosity surface sampling phase lead at the US space agency's Jet Propulsion Laboratory (JPL).