Cleaning tube pins and sockets

I have an older tube preamp which uses four of the type 6922 tubes. I have NOS tubes in there now. Once in a while I get some noise from one of the channels. Reseating the tubes clears up the noise problem. Obviously, it's time to clean the contacts. I can easily clean the tube pins but how can I clean the socket? The socket is soldered into the PC board. I was thinking about using a toothpick wrapped with a small piece of the thick blue paper towels that are sold in auto parts stores and working the toothpick in and out of the socket holes. I have Caig DeoxIT and ProGold on hand. Can I get by with either or both of these? I read that ProGoldPlus is recommended for high temp applications such as tubes. Any tips (or warnings) from you tube guys?
Thanks