I don't flush either per se but will let them use what they have for the last week or so and just water. if you want to call that flushing Ok but I think it's just sensible. they don't need anymore nutes the last 2weeks so why waste them. My smoke has been smooth, might try a vaporizer like the volcano where you can control the burn temp, it will help as well.

and there can not be enough said about curing. properly cured weed is smooth as silk, heady, and tasty.