One way to extend the life of your toothbrush and keep it sanitized is to use simple table salt. The ubiquitous mineral has hundreds of uses beyond flavoring food. All you need to do is fill a glass with hot tap water and add about 2 tablespoons of table salt. Swirl the glass so the salt dissolves, and insert the head of the toothbrush into the cup. Let it soak for an hour, then rinse. You can also sanitize other hygiene items, including tongue scrapers, dental picks and even hair combs.