So I hear people talking about dirty flashing all the time but I want to know under what circumstances do you guys usually dirty flash?? From what I understand s dirty install only wipes dalvik, cache, and system but NOT wiping data... Is that correct?? So for example if im staying on the same rom AOKP milestone 5 and just going to milestone 6 could I dirty flash so I dont loose all my app data etc... I do know u always make a backup though just in case.... Thanks in advance for the help..