Answer Question#1:

Everytime I get a new cel (but then again thats  
because I have many, many new bags and I've got 
to at least use SOME of them) 

 Answer Question#2:

 When my head explodes from trying to deal with 
that sticky crap on some of the bags.(bags that 
are folded and taped are not as bad--> see answer 
to Question #1)