HHhhmm....that is thought provoking, JC...what you say is definitely true...it is very easy for me to leave them in the case till the next time...of course, we are not now talking about the car top carrying things...
However, I've done it for many years and have not discerned a problem....
Also have a lot of friends that use them...but I don't know how often or soon they break their rigs down.
I just haven't had a problem....I have at times thought that a rod needs cleaning then I do it and it doesn't seem any the worse for wear....I should be a little more compulsive about cleaning my lines I will admit.....I don't really understand though what bad can happen to a stored graphite rod
....had to copy paste those