Loss of flavor
Last few days I've noticed something puzzling. About an hour or less into the session the shisha completely loses all flavor. Still producing good clouds, but no taste.
At first I thought it might be that the bowl just might be fully smoked, but when I removed the foil there was still plenty there. This has been true for 3 flavors/brand of shisha, so I don't think its the tobacco. Three different heads also.