I took the tube apart ok, pulled a new atty out of the package, put it on top of the base, and noticed that it didn't have the little pointy thing (hey, I'm new to this, give me a break) at the very top. So I took the pointy thing off the old one and slipped it on to the new one, but it won't stand straight up. It's kind of leaning over. Is there a trick to this? Is there a video on this??