Freezing your raw denim kills the bacteria inside them.
True Or False: FALSE
According to Stephen Craig Cary, an expert on frozen microbes at the University of Delaware: "One might think that if the temperature drops well below the human body temperature they will not survive, but actually many will. Many are preadapted to survive low temperatures.” Many of these bacterium probably started on your body in the first place, and once they get back on it's only a matter of time before they multiply.
The only way to get rid of bacteria for good? Cary offers this: “I would suggest that you either raise the temperature to 121 degrees Celsius [250 degrees Fahrenheit, the temperature used for sterilization] for at least 10 minutes... or just wash them!"