I've never had the need to do anything other than running under hot water (I've been known to do a quick dry burn on them too, but please don't tell anyone that because they may yell at me) I've soaked them twice in vodka, but I've never really felt that it helped so I stopped.
I've been using the same 2 attys in rotation all day every day since the beginning of August. I tried a new one the other day and I have to say, while the flavor was sharper and it produced a bit more vapor, I think I'll just keep using these two until they die.
So yes, to answer your question, a quick soak if you feel it necessary is pretty much all you need to do.