When it comes to cleaning, we Germans are world champions – we think. Wrong. Americans, Japanese and Spaniards are much cleaner than we are. We Germans have forgotten the basic rules of hygiene, say some. We’re so obsessed with hygiene that we’re making ourselves sick, say others. Do disinfectant cleaning agents and antibacterial clothes protect us from bacteria? Or do we live in surroundings that are too sterile, causing more and more allergies? A discourse on the world of suds and sprays.