HTC M8 can't reset the phone completely, what should I do?

A

AC Question

Htc m8 Cant reset the phone completely

Hi , this problem is huanting me since Lolipop (I got the phone and updated to lolipop rightaway) when i shut down the phone or reboot it , the RAM seem to be kept :/

In Setting > Battery it shows in histroy that the phone is awake for some days even tho i just rebooted it , the only way to reset it is to reach 0% but i only done it once since i heard its not good .

Is there anyway to reboot it 100% without reaching 0% or factory reset ?

Ps : I am atm at android M and tried to do chace reset but its no good either