I bought a Rozobrite Bath to go with my 1934 Aristocrat, but I plan to use it for all of my razors after I finish shaving. Kind of a 5 or 10 minute soak to keep them clean. My question is what should I fill it with? Rubbing alcohol or Barbicide? Or does it even matter? I just want to take proper care of my razors and want to be sure I'm not doing anything to damage them.