Coals going out?
I've been having a problem over the last several bowls I've smoked where the coals burn down about half way. Right about when it's time to add the wind cover to trap heat, the smoke gets very, very thin. An hour later when I come back to the hookah, I find that one or more of the coals simply went out and remain intact.
This has never happened before and I'm a little puzzled. Does anyone know why this would happen?