I have been smoking hookah for over 3 years... My parents have been smoking for over 15.
Now, I learned from them and others..AND it is common sense to not let your foil touch your shisha. If you do you will have burnt shisha and bad flavor. i always underpack nakhla and i bet i can get better clouds than anybody here. Including flavor.
Nakhla can manage heat pretty well. You sprinkle in a little, not a lot. and gently pack it down.
If you think we do it wrong make your own video and prove us wrong. Or actually make a video that we can all laugh at