I take them out of all their packaging in order 
to scan them in... afterwards I end up just 
leaving them out of the bag. I did put a few back 
in their bags, but the problem with them is 
they're not the right size so I'd have to fold 
and tape... or they're generally hard to manage. 
And the colour is never the same when shown 
through a couple layers of plastic. 

I do plan on buying some sort of a plain jewelry 
cloth to go over my cels with and see if I can't 
get the fingerprints off. (Shouldn't be too bad 
though, I always wash my hands before I handle 
them)

Of course all of this might very well be for 
naughty, because I haven't been brave/stupid 
enough to try replacing all the clear tape they 
use, which probably isn't acid-free.