Most people replace their mattresses on a somewhat regular basis. Unfortunately, most people don’t replace their box springs at the same time. Some people remain unaware that box springs wear out in the same way mattresses do. The truth is that a box spring is just as susceptible to wear and tear over time and is capable doing as much damage as a bad mattress can do to your sleep. There are several reasons you should replace your box spring, and the best time to do it is often when you replace your mattress.