I went to developer options and set root to apps and adb, but after months of flashing CM 13 my root still doesn't work. I confirmed it doesn't work when I ran root checker app. My CWM also doesn't work. When I restart in recovery my device is just black and nothing happens. When I boot into fastboot it shows [downloads] and the rest empty. I tried to install CWM following a youtube video but when I go into fastboot it says firmware update do not unplug usb 0% and its just stuck so I took out the battery and just rebooted.