Brushing your teeth is your first defense against oral health problems. It is important to know whether your equipment—the toothbrush—is doing its job to clean your teeth and remove plaque. One way to ensure your toothbrush will effectively help you maintain good oral hygiene is to look after it properly.
An article by the American Dental Association lists everything you need to know about proper cleaning, storage, and replacement of toothbrushes. Read more about it here: http://www.ada.org/1887.aspx