I'm still having fun "experimenting" 1 year later. I'm also a fan of lower end temps and packing new bowls often. I want to vaporize the trichomes and good stuff, not the fibrous material of the plant itself. As mentioned before, a lot of commercially grown herb is likely improperly flushed and contains some fertilizer residues etc. When a bowl is dead to me there is still a lot of vapor to be had in that herb, even without turning up the temp. Besides, even with packing a new bowl often, you still get more out of it than if you were combusting. Keep it fresh, clean and tasty.