iOS - Facebook Connect logout not deleting login details?

Question

I have used Facebook Connect on another project with relatively few problems, however on my current project it seems that when I call [facebook logout]; it does

Answer 1

You provide this method when user clicks on logout and remove all keys stored in userdefault for facebook

- (void)fbDidLogout
{
  NSLog(@"Logged out of facebook");
  NSHTTPCookie *cookie;
   NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
   for (cookie in [storage cookies])
   {
       NSString* domainName = [cookie domain];
       NSRange domainRange = [domainName rangeOfString:@"facebook"];
       if(domainRange.length > 0)
       {
           [storage deleteCookie:cookie];
       }
   }
}