Can't get into Download mode

I decided to upgrade to MM from LP using kdz method. However I could not boot into download mode with any method. The phones just reboots normally. I tried hard button(volume up and connecting to pc), I tried adb reboot bootloader, I tried to reboot to bootloader from twrp and none of them worked. In every method I used the phone just reboots normally.
I have root + twrp with stock 5.0 rom. Any help appreciated, thanks!