Kärcher ("makes a difference") is one of those great brands that could only be German. With a core area of expertise in pressure cleaning outdoors, now extended to indoors, this is engineering ingenuity at its best. The company was founded back in 1935 and continues to go from strength to strength, even getting involved in huge public cleaning projects such as the Brandenburg Gate or Mount Rushmore - the ultimate "expert endorsement", I suppose.
Kärcher, in a way, is Germany's Hoover. Herr Alfred Kärcher's name has not just become a household one - in every sense of the word - along with his fellow Württembergers Bosch, Daimler and Count Zeppelin, but he's also had the honour of becoming a verb. Even if some, such as the current French president, have been known to use the verb a little unwisely.