based on a report from the kassensturz tv show, kuhn rikon confirmed that there were 140 known cases of exploded double-walled pans of the durotherm brand by 2009, with 14 cases of injury. kuhn rikon stressed that this was not due to production errors, but to improper use, e.g. damage caused by dropping. in cases of uncertain damage after a fall, kuhn rikon recommends testing the appliance and carries out tests for customers free of charge.