The UK’s Advertising Standards Agency (ASA) has announced that it will be investigating in detail Tennant’s advertising for the so-called ec-H2O technology. The ASA is a supervisory agency that works for the government and the advertising industry and investigates complaints about unfair advertising or false advertising messages. Kärcher had filed a complaint with the ASA about Tennant’s claim that scrubber-driers equipped with ec-H2O technology require no detergent additive to clean floors and that tap water “activated” by means of ec-H2O technology is as effective as a cleaning agent. Kärcher considers these statements to be scientifically untenable and unfair. In addition to its complaint to the ASA, Kärcher has initiated legal proceedings against Tennant in Germany and Belgium.