Walking down a long corridor, through a quiet office or restaurant can be a mild form of torture in the wrong pair of shoes. When a constant squeaking, clicking or some other shoe-related noise follows you around, embarrassment often follows it. But why do shoes sometimes make these sounds? And most importantly, how can you put an end to squeaky shoes? It’s impossible to test beforehand whether a shoe model might start to squeak at some point. Liselotte Vijselaar, Head of the Physical Materials Testing and Inspections Department at the German Shoe Institute, says there are a number of differen…