As Longhunter seemed to put it - you can learn something new every day.
I suppose you all know the story of the Frog in the Pot:
That is... you put a frog in a pot of hot water, it will jump right out.
Put it in a pot of cool water and slowly raise the tmeperature, it will boil to death just sitting there. (Scientifically proven!)
Anyway, the moral of the story is... we can have change happen little by little and not see it coming... point in question --->
I was telling about warming up the Tung oil so it would flow better. Well that really worked, and then I finally ran the can dry. I bought a new can Sunday and oiled up another bow. The stuff was nice and thin right out of the store at room temperature!!!
What had happened was........ I have had than can for nearly 4 years (a little goes a long way) and it was slowly drying and getting thicker just from age and opening the can. Like the frog, I did not see it coming!
Anyway, it was good to learn that warming up the dregs works also. I wonder if I will remember this lesson 4 years from now!