first look on how to make a proper head (bowl)
+ make smaller holes
+ check if by any chance you put more or less tobacco
+ don't force and push the tobacco at once, spread it gently
+ smoke often, sometimes people smoke a lot and a lot on one hookah, it's recommended to take a break for a minute or so, once the tobacco is over burned.
+ use a toothpick from the bottom of the bowls, each bowl has several holes at the bottom of it, use a toothpick to make holes on the foil from the bottom of the bowl, as i demonstrate in the picture added (not a painter)