So I went to unpack/flush/repack my chest catheter yesterday,... I'm completely freaked out because old gunky crap in your catheter can't possibly be good and now it's going to dwell there for another three days. How in the heck could this have happened? I realize now maybe I should have repositioned the clamps from time to time, but even so, I've been flushing it and repacking every week so shouldn't that have been sufficient to keep the lines clean?