I bought an old micrometer today, nothing special but I've been wanting one. It is a little stiff, so the ratchet won't turn it, it just clicks but I can turn it directly. I read that old oil can get gummy or turn to varnish. I would like to inexpensively try to bring this back to reasonable health. What items might I find around my home or garage that I can use to clean the threads and then what can I oil them with. I read that a drop of ATF can do the trick in lieu of machine oil?
I know everything I read online is true but I greatly value the opinion of the folks here.
Any advice? I would like to get it working smooth enough for the ratchet to function.