I want to start by saying that I do my best not to ask much and I try to be helpful to others but I have a lot to learn and sometimes its the dumb stuff that gets me.. Anyway, I was up on the roof and...
When I removed my fridge vent lid, I just pulled/twisted a little, and the caulk came out in one piece, exposing the screws.
If you are talking about your tv antenna raising/sliding off the mount, you may need to add some short home made side pieces to keep this from happening. A pic would help to understand what you are talking about.