I am trying to replace an outdated hanging light fixture to a normal flush mount fixture. I've replaced several fixtures and know how to do it once removing the old one. However, I cannot remove this old fixture. The base will not spin loose and I see no other way to remove the fixture. It's an old house and this fixture could be several decades old. Is there some trick to remove the base and fixture for old hanging lights? I can send a picture if anyone requests it. Thanks.
