I logged out of my google+ account for a little while to let my brother search for something. I didn't think anything of it. He gave it back, I logged back in, no problems. He asked to borrow it again and I couldn't be bothered logging out again so he searched and then deleted my browser history, saying he was ordering my birthday present and didn't want me to see what it was. I noticed I was logged out on google+ and asked if he did it. He said he only cleared my browser history so to check I cleared it again and I got logged out. I don't want to have to log in again every time my history is cleared because it's really annoying. I have cookies enabled so I have no clue what is causing this. Any ideas?