I just got a nice Duofold Jr. in RHR with a reasonably clear (a little light) medium imprint. Just it looks so dirty and has lots of ink stain here and there. I tried to use a bit cold water on a tissue to wipe it. It could get rid some lighter ones, but still looked dirty. The end caps look a bit deteriating -- will likely discolor when touching water. Any suggestions? Use tooth brush with tooth paste?
Thanks, Jun