Maintaining proper oral hygiene when you have braces is a must. First, getting braces is a very expensive procedure so you should do all you can to take care of them properly, and besides that, braces can leave your teeth susceptible to bacteria and plaque accumulation which can add more problems like cavities and gingivitis.
When you got your braces done it is almost certain your dentist gave you a set of instructions to follow. Failure to do so will put the whole process at peril.