It all started with a nasty, grimmy rust covered tool box that I have been lugging around for the last five years. It's been in either a closet or now in the back corner of my garage since it was past down to me but I honestly could not rememer how or why I had it. Well this weekend I decided that I needed to do something so off to the garage to clean it up. While moving things around I stumbled upon this old box again and decided that it was time to open it up and see what is actually in it. Now I had opened it up before but I never took a good look inside it because it was full, quite literally, with dirt, coal dust and 60 years of grime.
I was floored with what I found in this box, old Craftsman sockets, extentsions and a speed driver, a Bonny 1/2" drive ratchet and a Snap On Midget M-70M 9/32nd ratchet

Now for my question. The sockets were all sitting in about all of crude and my fingers are to big to get in and clean the insides of the sockets. What is a good, safe way of cleaning them out that won't hurt the patina that has formed? All cleaning that was done last night was done with just a rag and some oil so I'd rather not have to use a chemical to clean them. I was thinking about boiling water and dropping the sockets into that to loosen the crude then washing them out in the sink with hot water. I'm just looking for a way to clean them that won't hurt the finish.
Thanks in advance