I'm replacing an old, outdated ceiling fan from 1987. It was here when we bought the house 6 years ago. On the canopy, there are no screws; but there are 2 what look like bolts sticking out. The canopy looks like it should twist and come down, but I can't get it to twist, like at all. I've tried wiggling, pushing pulling... the ball thingy does push up, but I can't get the canopy to move. Can anyone help?