Lil'Wayne

PLEASE HELP! Someone has access to my facebook and I can\’t do anything!?

I ALREADY CHANGED MY PASSWORD, HE’S BEEN ON FOR 3 DAYS. I enabled all sorts of security and this asshole somehow keeps logging into my account! What do I do? He deleted most of my friends and I don’t want to have to start another facebook. I checked my pc for keyloggers and nothing! How do I keep this idiot out!?
I have no idea where he is logging from. He keeps posting on my own wall and deleting my friends. I changed my password countless times already but he keeps logging in. I’m running out of ideas.
Thanks for the advice. But well, most of my allowed apps are at least 6 months old, but I deleted them all just in case. I have a feeling that this won’t solve the problem. Any other advice would be thankful