Can you not chew a hard candy before finishing it?
Cough drops, Werther's, butterscotch.. whatever your pleasure is. Are you able to let it completely dissolve, or do you find yourself chewing it, or breaking it apart with your teeth, before it's gone?
I think unless I consciously pay attention, I always chew it at some point before it's gone. I also, as a test of the converse, tried to keep a piece of gum in my mouth for 10 minutes without chewing it.. and I couldn't. I just had to chew it! (try it!)