I have a Moto X 2nd generation and a month or so ago got the "Marshmallow" system update. After that it would start to crash and restart every now and then. This week after a crash and reboot the swipe down menu quit working as well as the home button. After another crash and reboot (the crashes are also happening more frequently) trying to access some options in Settings will cause Settings to crash.
I would like to try removing the system update and see if that solves the issue but factory reset didn't clear it. How do I get rid of the Marshmallow update? Or, is there something else that I should try?