I tighten up the drags, give a quick rinse with fresh cold water, spray some salt away, leave it for a minute or 5 then wipe off with a clean dry towel.
I also take the spools off and wipe the inside (not the shaft or greasable parts - is that a word??? greasabe?you know what i mean).
Have always dont this with all of my good reals and have never had an issue.
Chris