How to Clean a Keurig 2022-23 byRick Viscomi •August 04, 2022 A Keurig coffee maker is up for sale on a store shelf in 2015 in Florida. In 2019, 30 million U.S. households (out of 129 million households total) used Keurig brewing systems, according to the company's annual report. In 1998, Keurig launched th…